Answer:a) {(a,b)[a is required to read book b or has read book b]}
b) {(a,b)[a has read book b that he was required to read)]
c) {(a,b)[a is either required to read book b or has read it but he has not read both)]
d) {(a,b)[a is required to read book b and he is yet to read book b)]
e) {(a,b)[a has read book b that was not required)]
Step-by-step explanation: The answers is a description of the explanation
The question asks about various operations with the sets R₁ and R₂, which represent the students and the books they are required to read and have read respectively. It looks at the union, intersection, symmetric difference, and difference of these two sets in relation to each other, where variables 'A' and 'B' represent a student and a book respectively.
Explanation:This is a question in set theory. We will be defining the different operations performed on the ordered pairs of two relations R₁ and R₂. Let's consider 'A' as a student studying in your school and 'B' be a book in the library, the ordered pairs (A, B) indicate the relationship between the student and the book.
R₁ ∪ R₂: Represents the union of the relations. This would contain all ordered pairs where 'A' is required to read 'B' (relation R₁) or 'A' has read 'B' (relation R₂).R₁ ∩ R₂: Represents the intersection of the relations. This would include all ordered pairs where 'A' is required to read 'B' (relation R₁) and 'A' has also read 'B' (relation R₂). In simpler terms, it's the books that students were required to read and they have read.R₁ ⊕ R₂: Represents the symmetric difference of the relations. This would contain ordered pairs where 'A' is either required to read 'B' or 'A' has read 'B', but not both.R₁ − R₂: Represents the difference of the relations. This includes all ordered pairs where a student 'A' is required to read a book 'B', but has not read it yet.R₂ − R₁: Represents the reverse difference of the relations. This set includes all ordered pairs where a student 'A' has read a book 'B' but was not required to read it for a course.Learn more about Set Theory here:
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(Score for Question 2: ___ of 6 points)
2. Solve each given equation and show your work. Tell whether it has one solution, an infinite number of
solutions, or no solutions, and identify each equation as an identity, a contradiction, or neither.
(c) 6x + 4x - 6 = 24 + 9x
(d) 25 - 4x = 15 - 3x + 10 - X
(e) 4x + 8 = 2x + 7 + 2x - 20
Answer:
Answer:
The answer to your question is below
Step-by-step explanation:
c) 6x + 4x - 6 = 24 + 9x
6x + 4x - 9x = 24 + 6
x = 30 This equation has one solution, it's an identity
d) 25 - 4x = 15 - 3x + 10 - x
-4x + 3x + x = 15 + 10 - 25
0 = 0 It has infinite number of solutions, it is an identity
e) 4x + 8 = 2x + 7 + 2x - 20
4x - 2x - 2x = 7 - 20 + 8
0 = -5 It has no solution it is a contradiction
Can Anyone answer this equation??
It's pretty hard. And I don't get it whatsoever.
=======================================
The tangent of an angle is the ratio of the opposite over adjacent sides.
tan(angle) = opposite/adjacent
tan(theta) = 4/3
This means that
opposite = 4 and adjacent = 3
This only happens when angle P is the reference angle. In other words,
tan(P) = 4/3
A Ferris wheel has a diameter of 42 feet. It rotates 3 times per minute. Approximately how far will a passenger travel during a 5-minute ride?a. 132 feet
b. 659 feet
c. 1,978 feet
d. 3,956 feet
Step-by-step explanation:
Diameter, D = 42 feet
Circumference = πD = π x 42 = 131.95 feet
Number of rotations per minute = 3
Total time = 5 minutes
Total rotations = 5 x 3 = 15
Distance traveled per rotation = 131.95 feet
Distance traveled in 15 rotations = 15 x 131.95 = 1978 feet
Option C is the correct answer.
am i correct on this equation??
-- need honest answers!!! --
Unfortunately you are incorrect. The answer is actually tan(y) = 20/21
The tangent of an angle is the ratio of the opposite and adjacent sides.
tan(angle) = opposite/adjacent
tan(K) = JL/LK
tan(y) = 20/21
----------------------
Side note: the tangent of angle x would be the reciprocal of this fraction since the opposite and adjacent sides swap when we move to angle J
tan(angle) = opposite/adjacent
tan(J) = LK/JL
tan(x) = 21/20
In March, Delphine's house had 40% more snowfall than in February. Delphine's house had f centimeters of snowfall in February.A. 40 f. B. 40+f C. 1.4f D. 40f+f
Answer:
It's A
Step-by-step explanation:
Trust Me
F(x)=-1/4x-3, find the value of x for which f(x)=x
Answer:
x = -2.4
Step-by-step explanation:
f(x) = -1/4x -3
x = -1/4x -3 . . . . . the desired value of f(x)
5/4x = -3 . . . . . . . add 1/4x
x = -12/5 . . . . . . . multiply by 4/5, the inverse of 5/4
__
Check
-1/4(-2.4) -3 = 0.6 -3 = -2.4 = x . . . . answer checks OK
Is √m+n = √m + √n for all values of m and n? Explain why or why not.
Step-by-step explanation:
√(m + n) = √m + √n
Square both sides:
m + n = m + 2√(mn) + n
Simplify:
0 = 2√(mn)
mn = 0
The equation is only true if either m or n (or both) is 0.
Final answer:
The square root of the sum of two numbers is not equal to the sum of the square roots of those numbers.
Explanation:
No, √m+n is not equal to √m + √n for all values of m and n. This is because of the nature of square roots and how they interact with addition. Taking the square root of a sum is not the same as the sum of the square roots. For example, for m = 4 and n = 9, √4 + √9 = 2 + 3 = 5, but √(4 + 9) = √13, which is not equal to 5. This example illustrates how the two expressions yield different results, emphasizing the importance of understanding the properties of square roots in mathematical operations.
There is not one particular frequency distribution that is correct, but there are frequency distributions that are less desirable than others
1. True
2. False
ANSWER: True
EXPLANATION:
The statement is true. Any correctly constructed frequency distribution is valid. However, some choices for the categories or classes give more information about the shape of the distribution.
A company's annual profit, P, is given by P=−x2+195x−2175, where x is the price of the company's product in dollars. What is the company's annual profit if the price of their product is $32?
Answer: the company's annual profit if the price of their product is $32 is $3041
Step-by-step explanation:
A company's annual profit, P, is given by P = −x²+ 195x − 2175, where x is the price of the company's product in dollars.
To determine the company's annual profit if the price of their product is $32, we would substitute x = 32 into the given equation. It becomes
P = −32²+ 195 × 32 − 2175
P = −1024 + 6240 − 2175
P = $3041
The amount of time workers spend commuting to their jobs each day in a large metropolitan city has a mean of 70 minutes and a standard deviation of 20 minutes. Assuming the distribution of commuting times is known to be mound-shaped and symmetric, what percentage of these commuting times are between 50 and 110 minutes?
Answer:
81.85% of the workers spend between 50 and 110 commuting to work
Step-by-step explanation:
We can assume that the distribution is Normal (or approximately Normal) because we know that it is symmetric and mound-shaped.
We call X the time spend from one worker; X has distribution N(μ = 70, σ = 20). In order to make computations, we take W, the standarization of X, whose distribution is N(0,1)
[tex] W = \frac{X-μ}{σ} = \frac{X-70}{20} [/tex]
The values of the cummulative distribution function of the standard normal, which we denote [tex] \phi [/tex] , are tabulated. You can find those values in the attached file.
[tex]P(50 < X < 110) = P(\frac{50-70}{20} < \frac{X-70}{20} < \frac{110-70}{20}) = P(-1 < W < 2) = \\\phi(2) - \phi(-1)[/tex]
Using the symmetry of the Normal density function, we have that [tex] \phi(-1) = 1-\phi(1) [/tex] . Hece,
[tex]P(50 < X < 110) = \phi(2) - \phi(-1) = \phi(2) - (1-\phi(1)) = \phi(2) + \phi(1) - 1 = \\0.9772+0.8413-1 = 0.8185[/tex]
The probability for a worker to spend that time commuting is 0.8185. We conclude that 81.85% of the workers spend between 50 and 110 commuting to work.
Lilla read 1/5 of her book last week. This week she read 3 times as much as she read last week. a. Write an expression to show how much of her book Lilla has left to read. Then simplify the expression. _______________________________________________________ _______________________________________________________ b. There are 75 pages in Lilla's book. How many pages does she have left to read? Show your work. Solution:___________________________________________________
Answer: she has 30 pages left to read.
Step-by-step explanation:
Let x represent the total number of pages in the book which Lilla is reading.
Lilla read 1/5 of her book last week. This means that the number of pages that she read last week is
1/5 × x = x/5
This week she read 3 times as much as she read last week. This means that the number of pages that she read this week is
3 × x/5 = 3x/5
The number of pages that she has left to read would be
x - 3x/5
= (5x - 3x)/5 = 2x/5
b. There are 75 pages in Lilla's book. It means that the number of pages that she has left to read would be
(2 × 75)/5 = 150/5
= 30
Final answer:
Lilla read 4/5 of her book after two weeks and has 1/5, or 15 pages, left to read of her 75-page book.
Explanation:
Lilla read 1/5 of her book last week. This week she read 3 times as much as she read last week. To express how much of her book Lilla has left to read, let us denote the total amount of the book as 1 (or 100%).
a. The amount she read this week would be 3 times 1/5, which is 3/5. Thus, the total amount Lilla read over the two weeks is 1/5 + 3/5, which simplifies to 4/5 of the book. Therefore, the expression for the amount of the book Lilla has left to read is 1 - 4/5, which simplifies to 1/5 of the book.
b. Lilla's book has 75 pages. To find out how many pages she has left to read, we calculate 1/5 of 75. This is done by multiplying 75 by 1/5:
75 imes 1/5 = 75/5 = 15 pages
Therefore, Lilla has 15 pages left to read.
Mrs Klein made fruit buns. She sold 3/5 of it in morning and 1/4 in the afternoon. If she sold 200 more buns in the morning than afternoon, how many buns did she make?
Answer:
The total number of buns Mrs Klein made = 400
Step-by-step explanation:
Question
Mrs Klein made fruit buns. She sold 3/5 of it in morning and 1/4 of the remaining in the afternoon. If she sold 200 more buns in the morning than afternoon, how many buns did she make?
Given:
Mrs Klein sold [tex]\frac{3}{5}[/tex] of the buns in the morning.
Mrs Klein sold [tex]\frac{1}{4}[/tex] of the remaining buns in the evening.
She sold 200 more buns in the morning than afternoon.
To find the total number of buns she make.
Solution:
Let the total number of buns be = [tex]x[/tex]
Number of buns sold in the morning will be given as = [tex]\frac{3}{5}x[/tex]
Number of buns remaining = [tex]x-\frac{3}{5}x[/tex]
Number of buns sold in the evening will be given as = [tex]\frac{1}{4}(x-\frac{3}{5}x)[/tex]
Difference between the number of buns sold in morning and evening = 200
Thus, the equation to find [tex]x[/tex] can be given as:
[tex]\frac{3}{5}x-\frac{1}{4}(x-\frac{3}{5}x)=200[/tex]
Using distribution:
[tex]\frac{3}{5}x-\frac{1}{4}x+(\frac{1}{4}.\frac{3}{5}x)=200[/tex]
[tex]\frac{3}{5}x-\frac{1}{4}x+\frac{3}{20}x=200[/tex]
Multiplying each term with the least common multiple of the denominators to remove fractions.
The L.C.M. of 4, 5 and 20 = 20.
Multiplying each term with 20.
[tex]20\times \frac{3}{5}x-20\times\frac{1}{4}x+20\times\frac{3}{20}x=20\times 200[/tex]
[tex]12x-5x+3x=4000[/tex]
[tex]10x=400[/tex]
Dividing both sides by 10.
[tex]\frac{10x}{10}=\frac{4000}{10}[/tex]
∴ [tex]x=400[/tex]
Thus, total number of buns Mrs Klein made = 400
A salesman packed 3 shirts and 5 ties. With one shirt, he could wear all 5 ties. With another shirt, he could wear 4 ties. With the third shirt, he could wear only 2 ties. How many different combinations did he have? a) 40 b) 22 c) 11 d) 10
Answer:
11 different combinations
Step-by-step explanation:
A salesman packed 3 shirts and 5 ties.
With one shirt, he could wear all 5 ties = 5 combinations
With another shirt, he could wear 4 ties = 4 combinations
With the third shirt, he could wear only 2 ties= 2 combinations
number of different combinations= [tex]5+4+2=11[/tex]
so answer is 11
The shape of France's production possibilities frontier (PPF) should reflect the fact that as France produces more cars and fewer trucks, the opportunity cost of producing each additional car?
Answer:
the opportunity cost of producing each additional car REMAINS CONSTANT
In the context of the BCG (Boston Consulting Group) matrix, the _____ is a poor performer that has only a small share of a slow-growth market. a. cash cow b. question mark c. star d. dog
Answer:
d. dog
Step-by-step explanation:
The BCG matrix is a tool used to assess the performance of the products of an organization on the basis of market share and market growth.
Basically there are 4 classes of products namely; Star, cash cow, question mark and dog.
Dogs are product with low market share and low growth.
Question mark have high growth but low market share while cash cows are the products with high mark share but low growth.
Stars are products with high market share and high market growth.
Hence dog is a poor performer that has only a small share of a slow-growth market. Option d.
Find DC
HELP PLEASE!! :(
using sine cosine or tangent
DC=14
Explanation
consider triangle ADB
<BAD=54°
sin<BAD=opposite side/ hypotenuse
sin 54°=BD/BA
BD=BA sin 54°=20*0.8=16
consider triangle BDC
cos <BCD=adjacent side/hypotenuse
=DC/BC
cos 28°=DC/BC
DC=cos28° *BC
=0.88*16=14.08
The average amount of a nutrient that is known to meet the needs of 50 percent of the individuals in a similar age and gender group is known as the?
Answer:
Estimated Average Requirement (EAR)
Step-by-step explanation:
The Estimated Average Requirement (EAR) is the average amount of daily intake value which is estimated to meet the needs of 50% of the healthy individuals.
The EAR is estimated on the basis of specific conditions of adequacy, and are derived from a careful study of the literature.
The major parameters which is selected for the criterion are reduction of disease risk.
A, B, and C are collinear, and B is between A and C. The ratio of AB to AC is 4:5. If A is at (-3,7) and B is at (1,-5), what are the coordinates of point C?
Answer:
Step-by-step explanation:
AB:AC=4:5
AB:BC=4:5-4 OR 4:1
So B divides AC in the ratio 4:1
A college faculty consists of 400 men and 250 women. The college administration wants to draw a sample of 65 faculty members to ask their opinion about a new parking fee. They draw a simple random sample of 40 men and another simple random sample of 25 women. What type of sample is this?
Answer:
The type of sample is Stratified sampling.
Step-by-step explanation:
Consider the provided information.
Types of sampling.
Random sampling is similar to placing the name of everyone in a hat and pulling out a few names.In Systematic sampling, we list of elements is counted off. Convenience sampling: data which is readily available is used. That is, the first people are running into by the surveyor.In Cluster sampling, we divide the population into groups, usually geographically. In Stratified sampling we divide population into groups called strata. but this time population might be separated into males and females.Here the population is divided into groups of males and females therefore it is stratified sampling.
Hence, the type of sample is Stratified sampling.
I have 200 coins to put into 4 bags I put the coins into each bag so that each bag has 2 mote coins than the one before How many coins are on each bag
First bag has 47 coins and second bag has 49 coins and third bag has 51 coins and fourth bag has 53 coins
Solution:
Given that,
Total number of coins = 200
Number of bags = 4
I put the coins into each bag so that each bag has 2 more coins than the one before
Therefore,
Each bag has 2 more coins than the one before. Based on this we can say,
Let "x" be the number of coins put in first bag
Then, x + 2 is the number of coins put in second bag
Then, x + 4 is the number of coins put in third bag
Then, x + 6 is the number of coins put in fourth bag
We know that,
Total number of coins = 200
[tex]x + x + 2 + x + 4 + x + 6 = 200\\\\4x + 12 = 200\\\\4x = 200-12\\\\4x = 188\\\\x = 47[/tex]
Thus,
Coins put in first bag = x = 47
Coins put in second bag = x + 2 = 47 + 2 = 49
Coins put in third bag = x + 4 = 47 + 4 = 51
Coins put in fourth bag = x + 6 = 47 + 6 = 53
Thus number of coins in each bag are found
Final answer:
By setting up an algebraic equation to distribute 200 coins into 4 bags with each bag having 2 more coins than the previous one, we find the number of coins in each bag are 47, 49, 51, and 53, respectively.
Explanation:
The question involves distributing 200 coins into 4 bags so that each subsequent bag has 2 more coins than the previous one. To find out how many coins are in each bag, let's denote the number of coins in the first bag as x. Consequently, the second bag would have x + 2 coins, the third bag x + 4 coins, and the fourth bag x + 6 coins. The total number of coins across all bags would be x + (x + 2) + (x + 4) + (x + 6) = 200.
Simplifying the equation, we get 4x + 12 = 200, which simplifies further to 4x = 188. Dividing both sides by 4 yields x = 47. Therefore, the number of coins in each bag, starting from the first to the fourth, are 47, 49, 51, and 53, respectively.
What is the median value of the set R, if for every term in the set, [tex]R_n = R_{n-1} + 3[/tex]? (1) The first term of set R is 15. (2) The mean of set R is 36.
Answer:
36
Step-by-step explanation:
Given that
[tex]R_n = R_{n+1} +3[/tex] is given
First term is 15
This is an arithmetic series with a =15 and d =3
If n is the number of terms, then we have
Sum of n terms = 36 xn = 36n
But as per arithmetic progression rule
[tex]S_n = \frac{n}{2} [2a+(n-1)d]\\= \frac{n}{2} [30+(n-1)3]=36n[/tex]
[tex]72 = 30+3n-3\\n-=15[/tex]
When there are n terms we have middle term is the 8th term
Hence median is 8th term
=[tex]a_8 = 15+7(3) \\=36[/tex]
A body of constant mass m is projected vertically upward with an initial velocity v0 in a medium offering a resistance k|v|, where k is a constant. Neglect changes in the gravitational force. a. Find the maximum height xm attained by the body and the time tm at which this maximum height is reached.
Answer:
tm = tₐ = -m/k ㏑{ [mg/k] / [v₀ + mg/k] }
Xm = Xₐ = (v₀m)/k - ({m²g}/k²) ㏑(1+{kv₀/mg})
Step-by-step explanation:
Note, I substituted maximum time tm = tₐ and maximum height Xm = Xₐ
We will use linear ordinary differential equation (ODE) to solve this question.
Remember that Force F = ma in 2nd Newton law, where m is mass and a is acceleration
Acceleration a is also the rate of change in velocity per time. i.e a=dv/dt
Therefore F = m(dv/dt) = m (v₂-v₁)/t
There are two forces involved in this situation which are F₁ and F₂, where F₁ is the gravitational force and F₂ is the air resistance force.
Then, F = F₁ + F₂ = m (v₂-v₁)/t
F₁ + F₂ = -mg-kv = m (v₂-v₁)/t
Divide through by m to get
-g-(kv/m) = (v₂-v₁)/t
Let (v₂-v₁)/t be v¹
Therefore, -g-(kv/m) = v¹
-g = v¹ + (k/m)v --------------------------------------------------(i)
Equation (i) is a inhomogenous linear ordinary differential equation (ODE)
Therefore let A(t) = k/m and B(t) = -g --------------------------------(ia)
b = ∫Adt
Since A = k/m, then
b = ∫(k/m)dt
The integral will give us b = kt/m------------------------------------(ii)
The integrating factor will be eᵇ = e ⁽k/m⁾
The general solution of velocity at any given time is
v(t) = e⁻⁽b⁾ [ c + ∫Beᵇdt ] --------------------------------------(iiI)
substitute the values of b, eᵇ, and B into equation (iii)
v(t) = e⁻⁽kt/m⁾ [ c + ∫₋g e⁽kt/m⁾dt ]
Integrating and cancelling the bracket, we get
v(t) = ce⁻⁽kt/m⁾ + (e⁻⁽kt/m⁾ ∫₋g e⁽kt/m⁾dt ])
v(t) = ce⁻⁽kt/m⁾ - e⁻⁽kt/m⁾ ∫g e⁽kt/m⁾dt ]
v(t) = ce⁻⁽kt/m⁾ -mg/k -------------------------------------------------------(iv)
Note that at initial velocity v₀, time t is 0, therefore v₀ = v(t)
v₀ = V(t) = V(0)
substitute t = 0 in equation (iv)
v₀ = ce⁻⁽k0/m⁾ -mg/k
v₀ = c(1) -mg/k = c - mg/k
Therefore c = v₀ + mg/k ------------------------------------------------(v)
Substitute equation (v) into (iv)
v(t) = [v₀ + mg/k] e⁻⁽kt/m⁾ - mg/k ----------------------------------------(vi)
Now at maximum height Xₐ, the time will be tₐ
Now change V(t) as V(tₐ) and equate it to 0 to get the maximum time tₐ.
v(t) = v(tₐ) = [v₀ + mg/k] e⁻⁽ktₐ/m⁾ - mg/k = 0
to find tₐ from the equation,
[v₀ + mg/k] e⁻⁽ktₐ/m⁾ = mg/k
e⁻⁽ktₐ/m⁾ = {mg/k] / [v₀ + mg/k]
-ktₐ/m = ㏑{ [mg/k] / [v₀ + mg/k] }
-ktₐ = m ㏑{ [mg/k] / [v₀ + mg/k] }
tₐ = -m/k ㏑{ [mg/k] / [v₀ + mg/k] }
Therefore tₐ = -m/k ㏑{ [mg/k] / [v₀ + mg/k] } ----------------------------------(A)
we can also write equ (A) as tₐ = m/k ㏑{ [mg/k] [v₀ + mg/k] } due to the negative sign coming together with the In sign.
Now to find the maximum height Xₐ, the equation must be written in terms of v and x.
This means dv/dt = v(dv/dx) ---------------------------------------(vii)
Remember equation (i) above -g = v¹ + (k/m)v
Given that dv/dt = v¹
and -g-(kv/m) = v¹
Therefore subt v¹ into equ (vii) above to get
-g-(kv/m) = v(dv/dx)
Divide through by v to get
[-g-(kv/m)] / v = dv / dx -----------------------------------------------(viii)
Expand the LEFT hand size more to get
[-g-(kv/m)] / v = - (k/m) / [1 - { mg/k) / (mg/k + v) } ] ---------------------(ix)
Now substitute equ (ix) in equ (viii)
- (k/m) / [1 - { mg/k) / (mg/k + v) } ] = dv / dx
Cross-multify the equation to get
- (k/m) dx = [1 - { mg/k) / (mg/k + v) } ] dv --------------------------------(x)
Remember that at maximum height, t = 0, then x = 0
t = tₐ and X = Xₐ
Then integrate the left and right side of equation (x) from v₀ to 0 and 0 to Xₐ respectively to get:
-v₀ + (mg/k) ㏑v₀ = - {k/m} Xₐ
Divide through by - {k/m} to get
Xₐ = -v₀ + (mg/k) ㏑v₀ / (- {k/m})
Xₐ = {m/k}v₀ - {m²g}/k² ㏑(1+{kv₀/mg})
Therefore Xₐ = (v₀m)/k - ({m²g}/k²) ㏑(1+{kv₀/mg}) ---------------------------(B)
The question is about an object projected upwards under gravity and a certain resistance. The equations of motion will be non-linear due to the nature of the resistance. Solving these equations metaphorically or numerically will yield the maximum height and time taken to reach that height.
Explanation:The subject matter here is mechanics which falls under Physics. Given that there is a body of constant mass m projected upwards with an initial velocity v0 and the medium being passed through provides a resistance of k|v|, the equations of motion under this resistance will be non-linear.
The question here pertains to the calculations related to an object moving upwards under a given resistance and gravity. To obtain the maximum height achieved by the body xm and the time taken to reach that tm, we employ the trick of non-dimensionalisation. First, we observe the units of all physical quantities and using this, we can introduce reduced physical quantities which are dimensionless.
Unfortunately, these non-linear equations don’t have a neat analytical solution, and methods of approximation or numerical techniques might be necessary to solve them for particular initial conditions.
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Given the pay rate and hours worked, determine the gross earnings. Make sure to include decimals and appropriate zeros. rate 6.50 hours 40
Final answer:
To determine the gross earnings for 40 hours worked at a pay rate of $6.50 per hour, multiply the pay rate by hours. The gross earnings would be $260.00.
Explanation:
To calculate the gross earnings given the pay rate and hours worked, we use a simple multiplication. However, there is an additional consideration mentioned in Exercise 3.1, which states that the employee should receive 1.5 times the hourly rate for hours worked above 40 hours. Therefore, the calculation involves two steps if the number of hours exceeds 40.
Calculation:
If hours ≤ 40, the formula is:In this particular case, the student only worked 40 hours at a pay rate of $6.50 per hour. Using the first formula, the gross earnings would be:
Gross Earnings = $6.50/hour × 40 hours = $260.00
A building was created from two stories. From a point 87 feet from the base of the building, the angle of elevation to the top of the first floor is 25° and the angle of elevation to the top of the second floor is 40°. To the nearest tenth of a foot, what is the height of the second floor?
- We´re gonna work with two separate triangles:
-The first one is the larger triangle (40º angle) and a vertical side that represents the ENTIRE height, b, of the tower.
Larger triangle with height b: tan 40°= [tex]\frac{b}{87}[/tex] ; .8390996312 = [tex]\frac{b}{87}[/tex]; b≈73.00166791
-The second one the smaller triangle (25º angle) and a vertical side, a, that represents the height of the first (bottom) section of the tower.
Smaller triangle with height a: tan 25°= [tex]\frac{a}{87}[/tex] ; ..4663076582 = [tex]\frac{a}{87}[/tex]; a≈40.56876626
-Then you need to solve for the vertical heights (b and a) in the two separate triangles.
-The needed height, x, of the second (top) section of the tower will be the difference between the ENTIRE height, b, and the height of the first (bottom) section, a. You will need to subtract.
In both triangles, the solution deals with "opposite" and "adjacent" making it a tangent problem.
Difference (b - a): 73.00166791 - 40.56876626 = 32.43290165 ≈ 32 feet
A local salesman receives a base salary of $925 monthly. He also receives a commission of 6% on all sales over $1700. How much would he have to sell in a month if he needed to have a monthly income of $2600?
Final answer:
To have a monthly income of $2600, the salesman needs to make total sales of $29,616.67, considering his base salary of $925 and a 6% commission for sales over $1700.
Explanation:
The question asks us to calculate how much a local salesman needs to sell to have a monthly income of $2600. The salesman receives a base salary of $925 and earns a commission of 6% for all sales over $1700.
To solve this, we need to figure out the total sales that would give the salesman an extra $1675 ($2600 total desired income minus the $925 base salary), knowing that he only gets a commission on the amount over $1700.
Let's denote the total amount in sales that the salesman needs to make as S.
The commission is only applied to the amount exceeding $1700, so the equation can be set up as follows:
0.06(S - $1700) = $1675. Solving this equation, we find that S - $1700 = $1675 / 0.06, which means S - $1700 = $27,916.67. Adding $1700 to both sides, we get S = $27916.67 + $1700, which equals $29,616.67.Therefore, the salesman would need to sell $29,616.67 worth of goods in a month to have a total monthly income of $2600.
A null and alternative hypothesis are given. Determine whether the hypothesis test is left-tailed, right-tailed, or two-tailed. Upper H 0: p less than or equals 0.6 Upper H Subscript a: p greater than 0.6 What type of test is being conducted in this problem?
Answer: right-tailed
Step-by-step explanation:
By considering the given information , we have
Null hypothesis : [tex]H_0: p\leq0.6[/tex]
Alternative hypothesis : [tex]H_a: p>0.6[/tex]
The kind of test (whether left-tailed, right-tailed, or two-tailed.) is based on alternative hypothesis.
Since the given alternative hypothesis([tex]H_a[/tex]) is right-tailed , so out test is a right-tailed test.
Hence, the correct answer is "right-tailed".
Define a function roll_hundred_pair() that produces a histogram of the results of 100 rolls of two 6-sided dice
Answer:
The code is attached. I used python to define the function and matplotlib library to plot the histogram.
Step-by-step explanation:
I defined a function called roll_hundred_pairI imported matplotlib.pyplot as plt and random I defined a list called diceI created an empty list to collect dice resultsI simulated 100 dice roll using a loop and random.sample finally I plot the histogram using plt.hist methodSome number was divided by 6.After which the quotient is added to 11. Next the sum is multiplied by 6 which resulted in 60. Given this product find the initial number.
Answer:
-6
Step-by-step explanation:
Marcelo had $49.13 in his bank account. He paid two fees of $32.50 each, and then he made two deposits of $74.25 each. What is the balance in dollars in Marcelo's account now?
Answer:
Current balance in Marcelo's account = $132.63
Step-by-step explanation:
Given:
Initial amount in Marcelo's bank account = $49.13
Amount paid in two fees = $32.50 each
Amount added by two deposits = $74.25 each
To find balance in dollars in Marcelo's account.
Solution:
Total amount paid in fees = [tex]2\times \$32.50=\$65[/tex]
Total amount deposited = [tex]2\times \$74.25=\$148.50[/tex]
The balance in Marcelo's account can be represented as:
⇒ Initial balance - Amount given in fees + Amount deposited
⇒ [tex]\$49.13-\$65+\$148.50[/tex]
⇒ [tex]\$132.63[/tex]
Thus, balance in Marcelo's account now = $132.63
Answer: 132.63
Step-by-step explanation:
I copied the other guy lol thanks for the points
A cardboard box manufacturing company is building boxes with length represented by x+ 1, width by 5- x, and height by x -1. The volume of the box is modeled by the function below V(x) 18 14 10 6 24 X 5 6 2 2 3 -2 -6 Over which interval is the volume of the box changing at the fastest average rate? [1,2] A. [1,3.5 B. C. [1,5] r0,3.51 D
Answer:
a. [1,2]
[tex] m= \frac{9-0}{2-1}=9[/tex]
b. [1,3.5]
[tex] m =\frac{17-0}{3.5-1}=6.8[/tex]
c. [1,5]
[tex] m =\frac{0-0}{5-1}=0[/tex]
d. [0,3.5]
[tex] m =\frac{17-(-5)}{3.5-0}=6.29[/tex]
So then we can conclude that the highest slope is for the interval [1,2] and that would be our solution for the fastest average rate.
a. [1,2]
[tex] m= \frac{9-0}{2-1}=9[/tex]
Step-by-step explanation:
Assuming that we have the figure attached for the function. For this case we just need to quantify the slope given by:
[tex] m = \frac{\Delta y}{\Delta x}[/tex]
For each interval and the greatest slope would be the interval on which the volume of the box is changing at the fastest average rate
a. [1,2]
[tex] m= \frac{9-0}{2-1}=9[/tex]
b. [1,3.5]
[tex] m =\frac{17-0}{3.5-1}=6.8[/tex]
c. [1,5]
[tex] m =\frac{0-0}{5-1}=0[/tex]
d. [0,3.5]
[tex] m =\frac{17-(-5)}{3.5-0}=6.29[/tex]
So then we can conclude that the highest slope is for the interval [1,2] and that would be our solution for the fastest average rate.
a. [1,2]
[tex] m= \frac{9-0}{2-1}=9[/tex]
The correct answer is A. [1,2].
To determine over which interval the volume of the box changes at the fastest average rate, we need to find the average rate of change of the volume function ( V(x) ) over the given intervals and compare them.
The volume ( V(x) ) of the box is given by:
[tex]\[ V(x) = (x + 1)(5 - x)(x - 1) \][/tex]
We first need to express ( V(x) ) in a simplified form. Let's expand the expression:
[tex]\[ V(x) = (x + 1)(5 - x)(x - 1) \]\[ V(x) = (x + 1)(x^2 - 6x + 5) \]\[ V(x) = x(x^2 - 6x + 5) + 1(x^2 - 6x + 5) \]\[ V(x) = x^3 - 6x^2 + 5x + x^2 - 6x + 5 \]\[ V(x) = x^3 - 5x^2 - x + 5 \][/tex]
Now, we calculate the average rate of change over each interval. The average rate of change of ( V(x) ) over an interval ([a, b]) is given by:
[tex]\[ \text{Average Rate of Change} = \frac{V(b) - V(a)}{b - a} \][/tex]
We need to compute this for each interval provided.
1. Interval [1, 2]:
[tex]\[ V(1) = (1 + 1)(5 - 1)(1 - 1) = 0 \]\[ V(2) = (2 + 1)(5 - 2)(2 - 1) = 3 \times 3 \times 1 = 9 \]\[ \text{Average Rate of Change} = \frac{V(2) - V(1)}{2 - 1} = \frac{9 - 0}{2 - 1} = 9 \][/tex]
2. Interval [1, 3.5]:
[tex]\[ V(1) = 0 \]\[ V(3.5) = (3.5 + 1)(5 - 3.5)(3.5 - 1) = 4.5 \times 1.5 \times 2.5 = 16.875 \]\[ \text{Average Rate of Change} = \frac{V(3.5) - V(1)}{3.5 - 1} = \frac{16.875 - 0}{3.5 - 1} = \frac{16.875}{2.5} = 6.75 \][/tex]
3. Interval [1, 5]:
[tex]\[ V(1) = 0 \]\[ V(5) = (5 + 1)(5 - 5)(5 - 1) = 6 \times 0 \times 4 = 0 \]\[ \text{Average Rate of Change} = \frac{V(5) - V(1)}{5 - 1} = \frac{0 - 0}{5 - 1} = 0 \][/tex]
4. Interval [0, 3.5]:
[tex]\[ V(0) = (0 + 1)(5 - 0)(0 - 1) = 1 \times 5 \times -1 = -5 \]\[ V(3.5) = 16.875 \]\[ \text{Average Rate of Change} = \frac{V(3.5) - V(0)}{3.5 - 0} = \frac{16.875 - (-5)}{3.5 - 0} = \frac{16.875 + 5}{3.5} = \frac{21.875}{3.5} \approx 6.25 \][/tex]
Comparing these average rates of change:
[tex]\([1, 2]\): 9\\ \([1, 3.5]\): 6.75\\ \([1, 5]\): 0\\ \([0, 3.5]\): 6.25[/tex]
The interval where the volume of the box is changing at the fastest average rate is [tex]\([1, 2]\)[/tex], with an average rate of change of 9.
Therefore, the correct answer is: A.[tex]\([1, 2]\)[/tex].
Complete question :