Answer:
x = 1/3 . . . . math facts or logarithms are involved; take your pick
Step-by-step explanation:
When you are solving for a variable that is in an exponent, logarithms are often useful. Taking the log of both sides of this equation, you have ...
log(8^x) = log(2)
Using the rules of logarithms, that is ...
x·log(8) = log(2)
x = log(2)/log(8) . . . . . divide by the coefficient of x
You can find the value of this on your calculator, and it will tell you the value is 0.333333333333 or as many digits as your calculator displays. That is a clue that the exact answer is probably 1/3.
__
You should recognize that 8 = 2·2·2 = 2^3, so log(8) = 3log(2) and the above solution becomes ...
x = log(2)/(3log(2)) = 1/3
__
Recognizing that 8 = 2^3, you can make that substitution into the original equation to get ...
(2^3)^x = 2
2^(3x) = 2^1
3x = 1 . . . . . . . matching exponents; equivalent to taking logs base 2
x = 1/3 . . . . . . divide by 3
__
All of the above using 2 as a base of exponents is just dancing around the fact that you already know the math fact ...
8^x = 2 = 8^(1/3)
x = 1/3 . . . . . equating exponents; equivalent to taking logs base 8
What is the volume of a cylinder, in cubic m, with a height of 5m and a base diameter of 20m? Round to the nearest tenths place
What is the volume of a cylinder, in cubic m, with a height of 5m and a base diameter of 20m? Round to the nearest tenths place.
Answer: 1570.8
The volume of a cylinder with a height of 5m and a base diameter of 20m is approximately 1,570.8 cubic meters when rounded to the nearest tenths place.
To find the volume of a cylinder with a height of 5m and a base diameter of 20m, we will use the formula for the volume of a cylinder: V = πr²h , where V is volume, r is the radius of the base, and h is the height of the cylinder. The radius is half of the diameter, so for a diameter of 20m, the radius is 10m. Substituting these values into the formula gives us V = (π × 10² × 5), which we can calculate as V = 3.1416 × 100 × 5 = 1,570.8 cubic meters, rounded to the nearest tenths place.
If Naomi were to paint her living room alone, it would take 5 hours. Her sister Jackie could do the job in 8 hours. How many hours would it take them working together? Express your answer as a fraction reduced to lowest terms, if needed.
Answer:
40/13
The decimal form is going to be 3.076
HELP HOW DO I FIND THE B VALUE OF THIS
Answer:
b = [tex]\frac{8}{3}[/tex]
Step-by-step explanation:
period = [tex]\frac{2\pi }{b}[/tex], that is
b = [tex]\frac{2\pi }{period}[/tex] = [tex]\frac{2\pi }{\frac{3\pi }{4} }[/tex] = 2π × [tex]\frac{4}{3\pi }[/tex] = [tex]\frac{8}{3}[/tex]
Answer:
f(x) = 4cos(8/3)x - 3.
The missing space is 8/3.
Step-by-step explanation:
The general form is f(x) = Acosfx + B where A = the amplitude, f = frequency and B is the vertical shift..
Here A is given as 4, B is - 3 and the frequency f = 2 π / period =
2π / (3π/4)
= 8/3.
So the answer is f(x) = 4cos(8/3)x - 3.
My Notes Determine the longest interval in which the given initial value problem is certain to have a unique twice-differentiable solution. Do not attempt to find the solution. (Enter your answer using interval notation.)t(t−4)y"+3ty'+4y=2,y(3)=0,y'(3)=−1
Answer:
The answer to the question is
The longest interval in which the given initial value problem is certain to have a unique twice-differentiable solution is (-∞, 4)
Step-by-step explanation:
To apply look for the interval, we divide the ordinary differential equation by (t-4) to
y'' + [tex]\frac{3t}{t-4}[/tex] y' + [tex]\frac{4}{t-4}[/tex]y = [tex]\frac{2}{t-4}[/tex]
Using theorem 3.2.1 we have p(t) = [tex]\frac{3t}{t-4}[/tex], q(t) = [tex]\frac{4}{t-4}[/tex], g(t) = [tex]\frac{2}{t-4}[/tex]
Which are undefined at 4. Therefore the longest interval in which the given initial value problem is certain to have a unique twice-differentiable solution, that is where p, q and g are continuous and defined is (-∞, 4) whereby theorem 3.2.1 guarantees unique solution satisfying the initial value problem in this interval.
The existence and uniqueness theorems for ODEs determine that the longest interval where the initial value problem has a unique and twice-differentiable solution is (0, 4), avoiding discontinuities at t=0 and t=4.
Explanation:The initial value problem provided is a second-order linear ordinary differential equation (ODE) of the form:
t(t-4)y"+3ty'+4y=2, with initial conditions y(3)=0 and y'(3)=-1.
To determine the longest interval in which the solution is guaranteed to be unique and twice-differentiable, we need to consider the existence and uniqueness theorems for ODE's, which are predicated on the functions of the equation being continuous over the interval considered. Here, the coefficients of y" and y' are t(t-4) and 3t respectively. The problematic points occur where the coefficient of y" is zero because it will make the equation not well-defined, which occurs at t=0 and t=4. Therefore, the longest interval around the initial condition t=3 that avoids these points is (0, 4). Within this interval, the coefficients are continuous, and hence, the conditions for the existence and uniqueness of the solution are satisfied.
The paraboloid z = 6 − x − x2 − 5y2 intersects the plane x = 2 in a parabola. Find parametric equations in terms of t for the tangent line to this parabola at the point (2, 2, −20).
Answer:
x = 2
y = 2 + t
z = -20 -20t
Step-by-step explanation:
First, we are going to find the equation for this parabola. We replace x = 2 in the equation of the paraboloid, thus:
[tex]z = 6-x-x^{2} -5y^{2}[/tex]
if x = 2, then
[tex]z = 6-(2)-2^{2}-5y^{2}[/tex]
[tex]z = -5y^{2}[/tex]
Now, we calculate the tangent line to this parabola at the point (2,2,-20)
The parametrization of the parabola is:
x = 2
y = t
[tex]z = -5t^{2}[/tex] since [tex]z = -5y^{2}[/tex]
We calculate the derivative
[tex]\frac{dx}{dt}= 0[/tex]
[tex]\frac{dy}{dt}= 1[/tex]
[tex]\frac{dz}{dt}= -10t[/tex]
we evaluate the derivative in t=2, since at the point (2,2,-20) y = 2 and y = t
Thus:
[tex]\frac{dx}{dt}= 0[/tex]
[tex]\frac{dy}{dt}= 1[/tex]
[tex]\frac{dz}{dt}= -10(2)= -20[/tex]
Then, the director vector for the tangent line is (0,1,-20)
and the parametric equation for this line is:
x = 2
y = 2 + t
z = -20 -20t
The parametric equation of the tangent line is [tex]L(t)=(2,2+t,-20-20t)[/tex]
Parabola :The equation of Paraboloid is,
[tex]z =6-x-x^{2} -5y^{2}[/tex]
Equation of parabola when [tex]x = 2[/tex] is,
[tex]z=6-2-2^{2} -5y^{2} \\\\z=-5y^{2}[/tex]
The parametric equation of parabola will be,
[tex]r(t)=(2,t,-5t^{2} )[/tex]
Now, we have to find Tangent vector to this parabola is,
[tex]T(t)=\frac{dr(t)}{dt}=(0,1,-10t)[/tex]
We get, the point [tex](2, 2, -20)[/tex] when [tex]t=2[/tex]
The tangent vector will be,
[tex]T(2)=(0,1,-20)[/tex]
The tangent line to this parabola at the point (2, 2, −20) will be,
[tex]L(t)=(2,2,-20)+t(0,1,-20)\\\\L(t)=(2,2+t,-20-20t)[/tex]
Learn more about the Parametric equation here:
https://brainly.com/question/21845570
The caldwells are moving across the country. Mr Caldwell leaves 3 hours before Mrs Caldwell. If he averages 45 mph and she averages 65 mph, how many hours will it take Mrs Caldwell to catch mr. Caldwell
Mrs. Caldwell will travel 135 miles at an additional 20 mph to catch up to Mr. Caldwell. Therefore, it will take Mrs. Caldwell 6.75 hours to catch up to Mr. Caldwell.
Explanation:This is a rate time distance problem in mathematics, typically learned in middle school. To calculate how long it will take Mrs. Caldwell to catch up with Mr. Caldwell, we need to compare the distance traveled by each person in the same time. Because rate equals distance over time (r=d/t), we know that the distance each person traveled is rate x time.
Mr. Caldwell left 3 hours before Mrs. Caldwell, so he traveled at 45 mph for 3 hours, or 135 miles. Once Mrs. Caldwell leaves, she needs to cover these 135 miles at a faster speed to catch up. Her speed is 20 mph greater than Mr. Caldwell’s. We divide the distance that Mr. Caldwell has covered (135 miles) by the difference in their speeds (20 mph) to find it will take Mrs. Caldwell 6.75 hours to catch up to him.
Learn more about Rate Time Distance here:https://brainly.com/question/35683374
#SPJ3
a bag contains 6 red jelly beans 4 green jelly beans 4 blue jelly beans
Answer:
12/91Explanation:
The question is incomplete. The complete question is:
A bag contains 6 red jelly beans, 4 green jelly beans, and 4 blue jelly beans.
If we choose a jelly bean, then another jelly bean without putting the first one back in the bag, what is the probability that the first jelly bean will be green and the second will be red?
Solution
The probability that the first jelly bean will be green is the number of green jelly beans divided by the total number of jelly beans:
4/14After chosing the first green jelly bean, there will be 13 jelly beans, from which 6 are red. Thus, the probability that the second jelly bean will be red is:
6/13The probability of the joint events is the product of the two consecutive events:
(4/14) × (6/13) =12/91 ← answer
The probability that the first jelly bean will be green and the second will be red is 12/91.
We start by determining the total number of jelly beans in the bag, which is:
6 red + 4 green + 4 blue = 14 jelly beans.
Step 1: Probability of the first jelly bean being green
The probability of drawing a green jelly bean first is the number of green jelly beans divided by the total number of jelly beans:
P(Green first) = 4/14 = 2/7.
Step 2: Probability of the second jelly bean being red
Once the first green jelly bean is chosen, there are now 13 jelly beans left in the bag, with 6 being red:
P(Red second | Green first) = 6/13.
Step 3: Combined probability
The combined probability of both events happening (first green, then red) is given by multiplying their individual probabilities:
P(Green first and Red second) = (2/7) * (6/13) = 12/91.
Thus, the combined probability is 12/91.
Complete question: A bag contains 6 red jelly beans, 4 green jelly beans, and 4 blue jelly beans. If we choose a jelly bean, then another jelly bean without putting the first one back in the bag, what is the probability that the first jelly bean will be green and the second will be red?
A scoop of ice cream has a 3 inch radius. How tall should the ice cream cone of the same radius be in order to contain all of the ice cream inside the cone?
Answer:
12cm
Step-by-step explanation:
The scoop of Ice Cream is in the shape of a circular solid which is a Sphere.
For the ice cream to fit into the cone, the volume of the cone must be equal to that of the sphere.
Radius of the Sphere=3cm
Volume of a Sphere = [tex]\frac{4}{3}\pi r^3[/tex]
Volume of a Cone=[tex]\frac{1}{3}\pi r^2h[/tex]
[tex]\frac{1}{3}\pi X 3^2h=\frac{4}{3}\pi X 3^3\\\frac{1}{3}h=\frac{4}{3} X 3\\\frac{1}{3}h=4\\h=4 X 3=12cm[/tex]
The Cone of same radius must be 12cm tall.
100 pyramid shaped chocolate candies with a square base of 12 mm size and height of 15 mm are melted in a cylinder coil pot if the part has a radius of 75 mm what is the height of the melted candies in the pot.
Answer: the height of the melted candies in the pot is 12.2 mm
Step-by-step explanation:
The formula for determining the volume of a square base pyramid is expressed as
Volume = area of base × height
Area of the square base = 12² = 144 mm²
Volume of each pyramid = 15 × 144 = 2160 mm³
The volume of 100 pyramid shaped chocolate candies is
2160 × 100 = 216000 mm³
The formula for determining the volume of a cylinder is expressed as
Volume = πr²h
Since the pyramids was melted in the cylindrical pot whose radius is 75 mm, it means that
216000 = 3.14 × 75² × h
17662.5h = 216000
h = 216000/17662.5
h = 12.2 mm
Answer:
The height of the melted candies in the pot is 4.07mm
Step-by-step explanation:
H= 100*1/3(12)^2(15)/π(75)^2=64/5π=4.07
PLEASE HELP!!!!
ERGF is inscribed in a circle.
Find the measure of angle E.
In a cyclic quadrilateral ( a quadrilateral that is inscribed in a circle),
opposite angles add up to 180 degrees. So you can form an equation and solve for x, and thus angle E.
Therefore:
(-2 + 6x) + (7x - 13) = 180
13x - 15 = 180
13x = 195
x = 15
So angle E = 5x
= 5 (15)
= 75 degrees
dont skip just help plz
Answer:
(1,-3)
Step-by-step explanation:
the x-axis for A is positive and the y-axis is negative. point A's X value is 1 because it is 1 point away from the origin and the value of the Y is 3 units away from the origin and it has to be negative.
Find a degree 3 polynomial with real coefficients having zeros 3 and 3−3i and a lead coefficient of 1. Write P in expanded form.
Answer:
P = x³ − 9x² + 36x − 54
Step-by-step explanation:
Complex roots come in conjugate pairs. So if 3−3i is a zero, then 3+3i is also a zero.
P = (x − 3) (x − (3−3i)) (x − (3+3i))
P = (x − 3) (x − 3 + 3i) (x − 3 − 3i)
P = (x − 3) ((x − 3)² − (3i)²)
P = (x − 3) ((x − 3)² + 9)
P = (x − 3)³ + 9 (x − 3)
P = x³ − 9x² + 27x − 27 + 9x − 27
P = x³ − 9x² + 36x − 54
Look at the proof. Name the postulate you would use to prove the two triangles are congruent.
A. AAA Postulate
B. SSS Postulate SAS
C. SAS Postulate
Answer:
Option C, SAS Postulate
Step-by-step explanation:
I think that it is option C because it does not give you 3 angles or 3 sides, it gives you 2 angles and 1 side.
Answer: Option C, SAS Postulate
When I count as a principal of $1000 and earns 4% simple interest per year and other account as a principal $1000 and earns 4% interest compounded annually which account has the greater balance at the end of four years
Answer: the account that earned compound interest has the greater balance at the end of four years.
Step-by-step explanation:
The formula for determining simple interest is expressed as
I = PRT/100
Where
I represents interest paid on the amount invested.
P represents the principal or amount invested.
R represents interest rate
T represents the duration of the investment in years.
From the information given,
P = 1000
R = 4%
T = 4 years
I = (1000 × 4 × 4)/100 = 160
Total amount earned is
1000 + 160 = $1160
The formula for determining compound interest is expressed as
A = P(1+r/n)^nt
Where
A = total amount in the account at the end of t years
r represents the interest rate.
n represents the periodic interval at which it was compounded.
P represents the principal or initial amount deposited
From the information given,
P = 1000
r = 4% = 4/100 = 0.04
n = 1 because it was compounded once in a year.
t = 4 years
Therefore,.
A = 1000(1+0.04/1)^1 × 4
A = 1000(1.04)^4
A = $1170
What are the solutions to the system of equations?
{y=2x2−8x+5
{y=x−2
Final answer:
To find the solutions to the system of equations, use the substitution method. The solutions are (1/2, -3/2) and (7, 5).
Explanation:
To find the solutions to the system of equations, we can use the substitution method. First, solve one of the equations for y in terms of x. Let's solve the second equation for y:
y = x - 2
Now substitute this expression for y into the first equation:
x - 2 = 2x^2 - 8x + 5
Now we have a quadratic equation. Rearrange it into standard form:
2x^2 - 9x + 7 = 0
Next, factor the quadratic equation:
(2x - 1)(x - 7) = 0
Set each factor equal to zero and solve for x:
2x - 1 = 0, x - 7 = 0
x = 1/2, x = 7
Now substitute these values of x back into either of the original equations to find the corresponding values of y:
For x = 1/2: y = 1/2 - 2 = -3/2
For x = 7: y = 7 - 2 = 5
So the solutions to the system of equations are (1/2, -3/2) and (7, 5).
Select the correct answer. Solve -9 2/7 -(-10 3/7) . A. -1 1/7 B. 1 1/7 C. 19 1/7 D. 19 5/7
Answer:
B. 1 1/7
Step-by-step explanation:
-9 2/7-(-10 3/7)
=-9 2/7+10 3/7
=1 1/7
Therefore, B. 1 1/7
Answer:
The answer is B
Step-by-step explanation:
B. 1 1/7
Tierra rode in a bike-a-thon. Her sponsors donated $7 for every 5 miles she biked. At the end of the bike-a-thon, Tierra had raised $147. How many miles did she ride?
Answer:
105 miles
Step-by-step explanation:
The question seeks to know the number of miles traveled by Tiera given that she received a certain amount of money in payment.
The total amount of money she received is $147. She receives $7 for every 5 miles traveled. The number of 5 miles traveled is calculated as 147/7 = 21
This means she traveled 5 miles 21 times.
Thus, the total number of miles she had traveled would be 21 * 5 = 105 miles in total
What do you know about the solution(s) to the system of equations?
A. There is no solution.
B. The solution is (2,0).
C. The solution is (0,−1).
D. There are infinitely many solutions.
Answer:
A because the linesnever cross.
Step-by-step explanation:
Answer:
There is no solution
Step-by-step explanation:
One number is 20 times another number. The product of the two numbers is 180. Write an equation and use it to find all pairs of numbers that satisfy the
Answer: the Smaller number is 3
The larger number is 60
Step-by-step explanation:
Let x represent the smaller of the numbers.
Let y represent the larger number.
One number is 20 times another number. This means that
y = 20x
The product of the two numbers is 180. This means that
xy = 180- - - - - - - - - -1
Substituting y = 2x into equation 1, it becomes.
x × 20x = 180
20x² = 180
x² = 180/20 = 9
x = √9
x = 3
y = 20x = 20 × 3
y = 60
The average number of field mice per acre in a 5-acre wheat field is estimated to be 14. (a) Find the probability that fewer than 12 field mice are found on a given acre. (b) Find the probability that fewer than 12 field mice are found on 2 of the next 3 acres inspected.
Answer:
(a) [tex]P(X < 12)=0.26[/tex]
(b) [tex]P(X=2)=0.15[/tex]
Step-by-step explanation:
Question a
This is a Poisson distribution. The average/mean, μ = 14
So, probability that fewer than 12 field mice are found on a given acre is:
[tex]P(X < 12) = e^{-14}(\frac{14^{0}}{0!} +\frac{14^{1}}{1!} + \frac{14^{2}}{2!} + \frac{14^{3}}{3!} +\frac{14^{4}}{4!} + \frac{14^{5}}{5!} +\frac{14^{6}}{6!}+\frac{14^{7}}{7!}+\frac{14^{8}}{8!} +\frac{14^{9}}{9!}+\frac{14^{10}}{10!}+\frac{14^{11}}{11!})\\ \\P(X < 12) = e^{-14}(1+14+98+457.33+1600.67+4481.87+10457.69+20915.38+36601.91+56936.31+79710.83+101450.15)\\\\P(X < 12) = 8.315*10^{-7}(312725.1248)=0.26 \\\\P(X < 12)=0.26[/tex]
Question b
This is a Binomial distribution with:
Probability of success, p = 0.26
n = 3
[tex]P(X=2)= (3C2)p^{2}(1-p)=\frac{3!}{2!(3-2)!}*(0.26^{2})*(1-0.26)\\ \\P(X=2)=3(0.0676)(0.74)=0.15\\\\P(X=2)=0.15[/tex]
Final answer:
To find the probability that fewer than 12 field mice are found on a given acre and on 2 of the next 3 acres inspected, use the cumulative distribution function (CDF) of the Poisson distribution and the binomial distribution.
Explanation:
To find the probability that fewer than 12 field mice are found on a given acre, we need to use the cumulative distribution function (CDF) of the Poisson distribution. The average number of field mice per acre is 14, so the parameter of the Poisson distribution is also 14.
(a) To find the probability that fewer than 12 field mice are found on a given acre, we calculate P(X < 12) = P(X = 0) + P(X = 1) + P(X = 2) + ... + P(X = 11), where X is the number of field mice found on a given acre
(b) To find the probability that fewer than 12 field mice are found on 2 of the next 3 acres inspected, we calculate P(X < 12) for each acre and use the binomial distribution to determine the probability of 2 successes out of 3 trials.
A pure acid measuring x liters is added to 300 liters of a 20% acidic solution. The concentration of acid, f(x), in the new substance is equal to the liters of pure acid divided by the liters of the new substance, or . Which statement describes the meaning of the horizontal asymptote? The greater the amount of acid added to the new substance, the more rapid the increase in acid concentration. The greater the amount of acid added to the new substance, the closer the acid concentration is to one-fifth. As more pure acid is added, the concentration of acid approaches 0. As more pure acid is added, the concentration of acid approaches 1.
Answer:
the answer is d
Step-by-step explanation:
A scientist measured the exact distance between two points on a map and came up with the following number: 0.04000 km.
Which digits are the significant figures in this measurement?
Explain your answer.
Answer:
The first zero after decimal point and 4 only
Step-by-step explanation:
Despite having 5 decimal points, the rules of significant figures dictate that unless there is a digit other than zero after, the only significant numbers are those that come before zero. For this case, the significant digits are only 0.04 but if it was 0.0400005 then all the other zeros would have also be considered significant.
Tara bought Three boxes of dog treats with 40 truth in each box two boxes of cat treats with 20 trees in each box simplify the expression below to find the total number of trees are bought
Answer:
Tara bought a total of 160 treats.
Step-by-step explanation:
We are given the following in the question:
Number of boxes of dog treats = 3
Number of treats in each dog box = 40
Total number of treats in dog box =
[tex]40 \times 3 = 120[/tex]
Number of boxes of cat treats = 2
Number of treats in each cat box = 20
Total number of treats in cat box =
[tex]20\times 2 = 40[/tex]
Total number of treats Tara brought =
Total number of treats in dog box + Total number of treats in cat box
[tex](40\times 3)+(20\times 2)\\= 120 + 40\\=160[/tex]
Thus, Tara bought a total of 160 treats.
Why is the law of cosines a stronger statement than the pythagorean theorem?
Answer:
Answer in explanation
Step-by-step explanation:
The two laws are mathematical laws which are used in navigating problems which involves triangles. While the Pythagorean theorem is used primarily and exclusively for right angled triangle, the cosine rule is used for any type of triangle.
So, why is the cosine rule a stronger statement? The reason is not far fetched. As said earlier, the cosine rule can be used to resolve any triangle type while the Pythagorean theorem only works for right angled triangle. In fact, we can say the Pythagorean theorem is a special case of cosine rule. The reason why the expression is different is that, for the expression, cos 90 is zero, which thus makes our expression bend towards the Pythagorean expression view.
The explanation regarding the law of cosines is the stronger statement if compared with the Pythagorean theorem is explained below.
Difference between the law of cosines be the stronger statement if compared with the Pythagorean theorem:The Pythagorean theorem is used when there is the right-angled triangle, while on the other hand, the cosine rule is used for any type of triangle. Here the Pythagorean theorem should be considered for the special case of cosine rule. Due to this the cosine law should be stronger if we compared it with the Pythagorean theorem.
Learn more about cosine here;https://brainly.com/question/16299322
Brainliest & 15 pts to whoever helps pls!!
You are comparing the heights of contemporary males and eighteenth-century males. The sample mean for a sample of 30 contemporary males is 70.1 inches with a sample standard deviation of 2.52 inches. The sample mean for eighteenth century males was 65.2 inches with a sample standard deviation of 3.51 inches. Is there sufficient data to conclude that contemporary males are taller than eighteenth-century males?
a. The P-value is less than 0.00001. There is insufficient data to reject the null hypothesis.
b. The P-value is greater than 0.00001. There is sufficient data to reject the null hypothesis.
c. The P-value is greater than 0.00001. There is insufficient data to reject the null hypothesis.
d. The P-value is less than 0.00001. There is sufficient data to reject the null hypothesis.
Answer:
D
Step-by-step explanation:
y = x + 2y = -2x + 2y = -3x + 2y = -5x + 2y = -
3
2
x + 2y = -
5
2
x + 2y = -x + 2y = 2x + 2y = 5x + 2y =
5
2
x + 2
0
Answer:
i need more context
Step-by-step explanation:
Which inequality can Josh use to determine x, the minimum number of visits he needs to earn his first free movie ticket?
Answer:
3.5x + 15 ≥ 55
Step-by-step explanation:
I think the question below contains the missing information.
Josh has a rewards card for a movie theater. - He receives 15 points for becoming a rewards card holder. - He earns 3.5 points for each visit to the movie theatre. - He needs at least 55 points to earn a free movie ticket. Which inequality can Josh use to determine x, the minimum number of visits he needs to earn his firs free movie ticket?
My answer:
Becoming a member = 15 pointsVisiting the moving theater = 3.5 pointsTotal points needed for a free movie ticket = 55Let x is the number of times he visits = 3.5x
Total points = Points received on becoming a member + Points received on x visits
So,
Total Points = 15 + 3.5x
We know the total points must be at least 55 for a free movie ticket. This can be expressed as:
3.5x + 15 ≥ 55
A right cylindrical solid is cut in half to form the figure shown. If the length is 20 cm and the diameter is 8 cm, what is the surface area?
(80π + 160) cm2
(96π + 160) cm2
320π cm2
(320π + 160) cm2
Answer:
(96π + 160) cm2
Step-by-step explanation:
Trevor Once to buy a car that cost 23600 he has 5000 for down payment how much more will Trevor O the car right solve and create an equation for his situation define the variable
Answer:
5000 + x = 23600
Step-by-step explanation:
a car that cost = 23600
down payment = 5000
So he needs to pay: 23600 - 5000 = 18600 more to get the car
Let x represent the amount he needs to pay more, an equation for his situation:
5000 + x = 23600
(1 point) A rock is thrown into a still pond and causes a circular ripple. If the radius of the ripple is increasing at a rate of 4 feet per second, how fast is the circumference changing when the radius is 18 feet?
Answer:
8pi feet per second
Or, 25.1 feet per second (3 sf)
Step-by-step explanation:
C = 2pi×r
dC/dr = 2pi
dC/dt = dC/dr × dr/dt
= 2pi × 4 = 8pi feet per second
dC/dt = 25.1327412287