a ratio is a rate, sometimes,never, or always?

Answers

Answer 1

Never True.
Ratio can be rate but rate can never be ratio. In essence, rate is comparison between ratios. While ratio is comparison between two or more numbers. Further, ratio on one hand, involves numbers either in amount, size, measurement, degrees, percentages or fractions with the absence of specific unit of measurement. On the contrary, rate is comparing quantities, amounts or unit of events happened expressed in a specific measurement or expressed under time. Take for instance, an example, Joe eats 2 while John eats 4 meals in a day. The ratio can be Joe: John, 2:4 meals. While the rate, is Joe eats 2 meals/day and John 4 meals/day.

Related Questions

Jan is twice as old as her sister betty, but half of joe's age. betty just got married. how old is joe most likely to be?

Answers

For this algebraic problem, you have to assign variables so you can formulate equations to help you solve the problem. Let x be the age of Jan, y be the age of Betty and z be the age of Joe. You are to find the value of z. The equations would be:

x = 2y and x = 0.5z

Equating this two yields 2y = 0.5z. There are two variables but only one equation. Therefore, you have to specify one of the variables to be able to solve this problem. It was mentioned that Betty just got married. Let's assume that Betty's age was around 30 years old. Then, it follows that y=30. Substituting this to the final equation,

2(30) = 0.5z
z = 120 years old

This is impossible. Betty must have been married at an early age. Let's assume that Betty is 18 years old, then

2(18) = 0.5z
z = 72 years old

If Betty was 18 years old, then Joe is 72 years old. This is only an illustration to the problem. You must have introduced Betty's age to know the exact answer for Joe's age.

The volume of a cube is found using the formula l3, where l is the side length. What is the volume of a cube, in cubic feet that is 3/5 of a foot long

Answers

The volume of a cube is defined by the formula l^3, as stated in the problem. The length of the cube given to us is 3/5 of a foot, meaning that the value of l is 3/5. So if we plug this into the equation, we get that (3/5)^3 = (3)^3/(5)^3 = 27/125. The units will also match up to be in cubic feet, so the answer is that the volume will be 27/125 cubic feet.

B is the midpoint of AC, D is the midpoint of CE. BD=10, and AE =2x. Find the length of CE if CD =3x

Answers

There is a theorem that states that the line joining two midpoints in a triangle is always parallel to the third side and its length is half the length of the third side.

Since B is midpoint of AC and D is midpoint of CE, therefore, BD is parallel to AE and BD = 0.5 AE
AE = 2 BD = 2 x 10 = 2x
Therefore, x= 10

D is the midpoint of CE and CD = 3x, therefore CE = 6x where x = 10
Based on this, CE = 6 x 10 = 60 units of length

Bruce had an EKG to measure his heartbeat rate. After conversion, the function produced could be modeled by a cosine function, and the wave produced a maximum of 4, minimum of −2, and period of pi over 2. Which of the following functions could represent Bruce's EKG read-out?
f(x) = 4 cos pi over 2x − 2
f(x) = 3 cos 4x + 1
f(x) = 3 cos pi over 2x + 1
f(x) = 4 cos 4x − 2

Answers

y= a.cos (bx) + midline

a = Amplitude = |4+2}/2 = |3|

Period = 2π/b = (2π) / (π/2) = 4

midline = (4-2)/2 = 1

Then the equation is:

y=3.cos(4x) + 1

Answer:

Option B.

Step-by-step explanation:

Bruce had an EKG to measure his heartbeat rate. After conversion, the function produced was modeled by a cosine function.

Now we will form this function.

Function will be in the form of f(x) = a cos(Bx) + d

Amplitude [tex]a=\frac{Maximum-minimum}{2}[/tex]

[tex]a=\frac{4+2}{2}=3[/tex]

Period = π/2

And [tex]Period=\frac{2\pi }{B}[/tex]

⇒[tex]\frac{\pi }{2}=\frac{2\pi }{B}[/tex]

⇒ B = 4

Since minimum is (-2) and maximum is (4), means cosine graph was shifted upwards.

Mid line of the graph is [tex]x=\frac{4+2}{2}=3[/tex] which shows graph is shifted by one unit above the x-axis.

Now the function we get is f(x) = 3 cos4x + 1

Therefore option B is the answer.

Bob is driving along a straight and level road toward a mountain. At some point on his trip, he measures the angle of elevation to the top of the mountain and finds it to be 21°44'. Find the height of the mountain to the nearest foot if Bob is 13,428.7 feet from the center of the mountain at the base.
A. 5453 ft
B. 5353 ft
C. 53,534 ft
D. 535,342 ft

Answers

tan 21 44 = h / 13428.7
h = 13428.7 * tan 21 44

Height = 5353 feet

Answer:

Option B is the correct answer.

Step-by-step explanation:

The arrangement is given in the below figure.

We have height of the mountain = x

We also have

[tex]tan(21^044')=\frac{x}{13428.7}\\x=5352.98ft[/tex]

Height of the mountain to the nearest foot = 5353 ft

Option B is the correct answer.

how to factor 6x^2+5x+1

Answers

Here you go, explains how to do it and your answer.

Simplify: 6/3-y -2/y

Answers

Since 6/3=2, we could make it 2-y-2/y. If we wanted everything over y, we could make it (2y-y^2-2)/y by multiplying both 2 and y with y. This is not factorable due to that nothing multiplies to -2 and adds up to 2.

how would you prove two circles are similar

Answers

Is this a real question lol? but anyways i think that it's by shape.
GOOD LUCK!

Answer:

it is by similarity transformations

Step-by-step explanation:

so like it would be a rigid transformation then a dilation

EX- A translation then a dilation of R/r

Find three positive numbers x, y, and z that satisfy the given conditions. the sum is 180 and the product is maximum.

Answers

I don't know of any algebraic way to answer this, but 59,60,61 add up to 180, and 60^3 would be the greatest product of 3 numbers, so 59,60,61 yield the greatest product.

(07.03 LC)

The steps below show the incomplete solution to find the value of p for the equation 4p − 2p + 4 = −1 + 21:

Step 1: 4p − 2p + 4 = −1 + 21
Step 2: 4p − 2p + 4 = 20
Step 3: 2p + 4 = 20

Which of these is most likely the next step?
2p = 5
2p = 8
2p = 16
2p = 24

Answers

Step 1: 4p − 2p + 4 = −1 + 21
First they combined like terms on one side.

Step 2: 4p − 2p + 4 = 20
Then they combined like terms on the other side.

Step 3: 2p + 4 = 20
Now you have to subtract 4 from both sides.

Step 4: 2p = 16

So the answer is C. 2p = 16

It's 2p = 16. You subtract 4 from both sides.
2p+4=20
-4=-4
2p = 16

He sum of three consecutive odd integers is −375. find the three integers.

Answers

-375/3 = -125

-125-2 =-127

-125+2 = -123

-123 + -125 + -127 = -375

x = first integer
x+2 = second integer
x+4 = third integer

x + x+2 + x+4 = -375
3x = -375 - 6
3x = -381
x = -381/3 = -127 ← first integer

second integer = -127 + 2 = -125

third integer = -127 + 4 = -123

Answer: -127, -125 and -123

Write the function in vertex form, and identify its vertex. g(x) = 5x2 - 50x + 128

Answers

hello :
g(x) = 5x² - 50x + 128
= 5(x²-10x +128/5)
= 5 (x²-10x+5²-5² +128/5)
= 5 ((x-5)² +128/5 -125/5)
y = 5 ((x-5)² - 3/5)
y= 5(x-5)² +3.....vertex form
the vertex is : (5,3)

What is the value of n in the equation –(2n + 4) + 6 = –9 + 4(2n + 1)?

Answers

Final answer:

The value of n in the equation –(2n + 4) + 6 = –9 + 4(2n + 1) is -2. This is determined by simplifying and solving the given expression for n.

Explanation:

To find the value of n in the equation –(2n + 4) + 6 = –9 + 4(2n + 1), we need to simplify and solve for n. First, we distribute the negative sign and the 4 into the parentheses and then combine like terms:

-2n - 4 + 6 = -9 + 8n + 4

Now, we combine the constants:

-2n + 2 = -5 + 8n

To isolate n, we move all the terms involving n to one side and the constants to the other:

-2n - 8n = -5 - 2

-10n = -7

Finally, we divide by -10 to solve for n:

n = ⅔

Thus, the value of n is -2.

In the triangle below, what is the side opposite the 30 degree angle

Answers

[tex]tan(30^o)= \frac{opposite }{adjacent} \ \ \ \ \to \\ \\ opposite = adjacent*tan(30^o)=3* \frac{ \sqrt{3} }{3} = \sqrt{3} [/tex]

Simplify 15 to the 18th power over 15 to the 3rd power.

Answers

(15^18) / (15^3)

If the exponents you're dividing have the same base, you subtract them.
18 - 3 = 15

15^15

[tex] \cfrac{15^{18}}{15^3} = 15^{18-3}=15^{15}[/tex]

If the telescope is 1 m deep and 8 m wide, how far is the focus from the vertex?
1
2
4
16
Find the vertex, focus, directrix, and focal width of the parabola.

negative 1 divided by 12 times x squared = y

Answers

First, let me introduce the general equation of the parabola:

(x-h)^2 = +/- 4a(y-k) or (y-k)^2=+/- 4a(x-h), where

(h,k) are the coordinates of the vertex
a is the distance of the vertex to the focus
4a = length of lactus rectum or the focal width

If the equation contains (x-h)^2, then the parabola passes the x-axis twice. Similarly, (y-k)^2 passes the y-axis twice. If the sign is (-), it opens to the left(if y-axis) or downward (if x-axis). If the sign is (+), it opens to the right(if y-axis) or upward (if x-axis).

The equation of the parabola is -1/12 x^2 = y. Rearranging to the general form:

x^2 = -12y
Therefore,

-4a = -12
4a = 12
a = 3, and the parabola is facing downwards.

The vertex is (0,0) at the origin.
The focus is (0,-3). Since it is negative, the focus is situated downwards, hence -3.
The directrix is the mirror image of the focus. Hence, it is a line passing +3 on the y-axis. y=3
Focal width is 4a which is equal to 12 units.

A regular pyramid has a height of 12 centimeters and a square base. if the volume of the pyramid is 256 cubic centimeters, how many centimeters are in the length of one side of its base

Answers

Let the length of one side of the base square be a cm.

The Volume of a pyramid is [tex] \frac{1}{3}*area_b_a_s_e *height[/tex]

the area of the base is a^2,

we apply the formula

[tex]256= \frac{1}{3}*a^{2}*12 [/tex]

[tex]256= 4a^{2} [/tex]

[tex]256= (2a)^{2} [/tex]

[tex]2a= \sqrt{256}=16[/tex]

a=8 (cm)

Answer: 8 cm

the lines shown below are perpendicular. if the green line has a slope of 3/4, what is the slope of the red line
a)4/3
b)-3/4
c)-4/3
d) 3/4

Answers

perpendicular slope is opposite and reciprocal

the green line has a slope of 3/4
so the slope of the red line is -4/3

answer
c)-4/3

The slope of the red line is -4/3. Therefore, option C is the correct answer.

Given that, the green line has a slope of 3/4.

We need to find the slope of the red line.

What is the formula to find the slope of the perpendicular line?

The formula for the slope of perpendicular lines is m1.m2 = -1. The product of the slopes of perpendicular lines is equal to -1.

Since, m1=3/4.

Now, 3/4.m2 = -1

⇒m2 =-4/3

The slope of the red line is -4/3. Therefore, option C is the correct answer.

To learn more about the slope visit:

https://brainly.com/question/3605446.

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Mario and Luigi want to purchase some extra controllers for their friends.each controller costs 29.99. Use an algebraic expression to describe how much they spend in total,before sales tax,based on purchasing the console(299.00)the number of games(59.99 each) and the number of extra controllers

Answers

How many controllers do they need

i cant answer this question because it doesnt say how many friends they have

Dr. Black is standing 15 feet from the streetlamp. The lamp is making his shadow 8 feet long. He estimates that the angle of elevation from the tip of his shadow to the top of the streetlamp is 50°. To the nearest foot, the streetlamp is about _______

Answers

use tangent because tangent is opposite over adjacent ( to remember sin cos and tan use the phrase "Oscar Has A Hairy Old Asss")
the angle is from his shadow so use (15+8) as the adjacent side
so tan(50)=x/23
so tan(50)(23)=x
so x=about 27 feet

In physics, if a moving object has a starting position at s 0, an initial velocity of v 0, and a constant acceleration a, then the position S at any time t > 0 is given by:

S = at 2 + v 0 t + s 0.

Solve for the acceleration, a, in terms of the other variables. For this assessment item, you can use ^ to show exponents and type your answer in the answer box, or you may choose to write your answer on paper and upload it.

Answers

Actually the position function with respect to time under constant acceleration is:

a=g

v=⌠g dt

v=gt+vi

s=⌠v

s=gt^2/2+vit+si

So if vi and si are zero then you just have:

s=gt^2/2

Notice that it is not gt^2 but (g/2) t^2

So the first term in any quadratic is half of the acceleration times time squared because of how the integration works out...

Anyway....

sf=(a/2)t^2+vit+si

(sf-si)-vit=a(t^2)/2

2(sf-si)-2vit=at^2

a=(2(sf-si)-2vit)/t^2 and if si and vi equal zero

a=(2s)/t^2

Step-by-step explanation:

The equation of a moving object in physics is given by :

[tex]s=at^2+v_ot+s_o[/tex]...........(1)

Where

s₀ is the starting position of an object

a is the acceleration of the object

v₀ is the initial velocity of the object

t is the time taken

We need to find the value of acceleration by rearranging equation (1). Subtract [tex](v_ot+s_o)[/tex] on both sides of equation (1) as :

[tex]s-v_ot-s_o=at^2[/tex]

Divide both sides of above equation by t² as :

[tex]a=\dfrac{s-v_ot-s_o}{t^2}[/tex]

So, the value of acceleration is [tex]\dfrac{s-v_ot-s_o}{t^2}[/tex]. Hence, this is the required solution.

Is the number of fish caught during a fishing tournamentnumber of fish caught during a fishing tournament discrete or continuous?

Answers

Final answer:

The number of fish caught in a fishing tournament is a discrete variable, as it can only take specific or separate values which are whole numbers, not fractions or decimals.

Explanation:

The number of fish caught during a fishing tournament would be considered a discrete variable in mathematics. This is because discrete variables are variables that can only take specific or separate values.

In this case, you can't catch half a fish or 2.3 fish in a tournament, you can only catch whole fish. This makes the number of fish caught a discrete variable because the count can only be in whole numbers. This is different from a continuous variable, such as the amount of time spent fishing or the weight of the fish caught, which could take on any value within a given range.

Learn more about Discrete Variable here:

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A hypothesis is only tentative: to make sure it's valid, you have to ___________.

Answers

a hypothesis is only tentative: to make sure it's valid, you have to test it.

Help with geometry...

Answers

so... doing the distances from ABC to GHI

[tex]\bf \textit{distance between 2 points}\\ \quad \\ \begin{array}{lllll} &x_1&y_1&x_2&y_2\\ % (a,b) A&({{ 1}}\quad ,&{{ 2}})\quad % (c,d) G&({{ -4}}\quad ,&{{ 2}})\\ B&({{ 2}}\quad ,&{{ 3}})\quad % (c,d) H&({{ -3}}\quad ,&{{ 3}})\\ C&({{ 3}}\quad ,&{{ 1}})\quad % (c,d) G&({{ -2}}\quad ,&{{ 1}}) \end{array}\qquad % distance value d = \sqrt{({{ x_2}}-{{ x_1}})^2 + ({{ y_2}}-{{ y_1}})^2}\\\\[/tex]

[tex]\bf -------------------------------\\\\ AG=\sqrt{(-4-1)^2+(2-2)^2} \\\\\\ BH=\sqrt{(-3-2)^2+(3-3)^2} \\\\\\ CG=\sqrt{(-2-3)^2+(1-1)^2}[/tex]

and doing the distances from ABC to DEF

[tex]\bf \textit{distance between 2 points}\\ \quad \\ \begin{array}{lllll} &x_1&y_1&x_2&y_2\\ % (a,b) A&({{ 1}}\quad ,&{{ 2}})\quad % (c,d) D&({{ 1}}\quad ,&{{ -1}})\\ B&({{ 2}}\quad ,&{{ 3}})\quad % (c,d) E&({{ 2}}\quad ,&{{ 0}})\\ C&({{ 3}}\quad ,&{{ 1}})\quad % (c,d) F&({{ 3}}\quad ,&{{ -2}}) \end{array}\qquad % distance value d = \sqrt{({{ x_2}}-{{ x_1}})^2 + ({{ y_2}}-{{ y_1}})^2}[/tex]

[tex]\bf -------------------------------\\\\ AD=\sqrt{(1-1)^2+(-1-2)^2} \\\\\\ BE=\sqrt{(2-2)^2+(0-3)^2} \\\\\\ CF=\sqrt{(3-3)^2+(-2-1)^2}[/tex]

now... the ABC to JKL... surely you'd know how to do... the same way, just use the distance formula

any ideas friends? cant seem to figure this out

Answers

I = 7.6*10^(-4) is the given intensity of the sound
Io = 10^(-12), which is a constant usually shown in a table or in your book

Plug in those values to get
B = 10*log(I/Io)
B = 10*log((7.6*10^(-4))/(10^(-12)))
B = 88.808135922808
B = 88.81

Answer: Approximately 88.81 decibels

solve for y. 8x+y=15

Answers

8x + y = 15

y = 15 - 8x

8x + y + -1y = 15 + -1y

8x = 15 + -1y

x = 1.875 + -0.125y

x = 1.875 + -0.125y

Write the sum using summation notation, assuming the suggested pattern continues. -9 - 3 + 3 + 9 + ... + 81

Answers

-9 -3 +3 +9 +15 +....+81=15+21+...+81=(23*66)/2=759

Honestly I believe this is correct:

∑ 15 at the top, n =0 (-9+6n)

In how many ways can 50 cards be chosen from a standard deck of 52 cards?

Answers

The answer must take into account that the order is irrelevant, that is that it is the same J, Q, K that Q, K, J, and K, J, Q and all the variations of those the three cards.

The number of ways you can draw 50 cards from 52 is 52*51*50*49*48*47*...4*3 (it ends in 3).
,
But the number of ways that those 50 cards form the same set repeats is 50! = 50*49*49*47*....3*2*1

So, the answer is (52*51*50*49*48*....*3) / (50*49*48*...*3*2*1) = (52*51) / 2 = 1,326.

Note that you obtain that same result when you use the formula for combinations of 50 cards taken from a set of 52 cards:

C(52,50) = 52! / [(50)! (52-50)!] = (52*51*50!) / [50! * 2!] = (52*51) / (2) = 1,326.

Answer: 1,326

Solve log 1/100 = log(10^x+2)

A.) x= 0

B.) x= -2

C.) x= -4

D.) x= 4

Answers

i believe the answer is C: x= -4

Write the equation of a circle with center (-2,3) and a radius of 4. Show all work to receive credit.

Answers

The equation of the circle is given by:
(x-a)^2+(y-b)^2=r^2
where:
(a,b) is the center of the circle
given that the center of our circle is (-2,3) with the radius of 4, the equation will be:
(x+2)^2+(y-3)^2=4^2
expanding the above we get:
x^2+4x+4+y^2-6y+9=16
this can be simplified to be:
x^2+4x+y^2-6y=16-13
x^2+y^2+4x-6y=3

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Determine which system below will produce infinitely many solutions.6x + 3y = 184x 3y = 62x + 4y = 246x + 12y = 363x y = 149x + 3y = 425x + 2y = 13x + 4y = 6 What is one reason scholars believe that public opinion matters in american politics? Which type of figurative language is the author using in this excerpt from "how do i love thee"A.personificationB.hyperboleC oxymoronD.simile Which characteristic best describes a memoir? It is a form of poetry. It is fictional prose. It is creative non-fiction. It is not considered literature. A patient is discovered to have a strange craving for iron objects. to try to determine the cause, her physician decides to order tests to determine if this patient might have some type of ______. The simplest, yet most effective method of preventing the spread of an infectious disease is to: (06.02 MC)A group of students plotted the number of hours they worked at a cake shop during the holidays and the number of cakes they delivered in a weekWhich statement best describes the relationship between the number of hours spent working at the cake shop and the number of cakes delivered? Greater hours worked, more cakes delivered Fewer hours worked, more cakes delivered Greater hours worked, fewer cakes delivered There is no relationship between hours spent working and number of cakes delivered. A ball thrown with 50N of force accelerates at 25 m/s2. What is the mass of the ball? The petroleum industry uses deep-well injection to dispose of its hazardous waste. though the wastes are pumped into porous rock, the industry claims the wells are safe because _____. Simplify the expression please What should be done to stay safe during a severe lightning storm when outside? Let r=1+2i and s=3+3i find rs The __________ plan that was proposed at the constitutional convention favored large states. it called for a legislature in which the number of representatives would be in proportion to each states population in southern Europe, Latin became what five different , but closely related, languages If you found rocks that had been buried deep within the earth under high heat and pressure, they would most likely be what type of rocks? Sedimentary Metamorphic Igneous Lava Write a balanced equation for the decomposition of tnt. assume that, upon explosion, tnt decomposes into n2(g),co2(g),h2o(g), and c(s): During Domenicas oral presentation about the history of horror movies, she read from her notes often. She also showed clips from three films, commented on each one, and she provided photographs of several famous directors. After the presentation, she took questions from the audience. She didnt know the answer to one students query, so she referred him to a website that she had used during her research.What could Domenica have done to make her oral presentation more effective?She could have looked at her note cards only occasionally.She could have provided longer clips from each horror film.She could have pretended to know the answer to the question.She could have stopped herself from commenting on the films. An effect of the Yom Kippur War was The measure of an angle's supplement is 24 less than twice the measure of the angle. Find the measure of the angle and its supplement 1.2, 3, 7.5, 18.75, ...Which formula can be used to describe the sequence?f(x) = 1.2(2.5)x 1f(x) = 2.5(1.2)x 1f(x) = 1.2(2.5)xf(x) = 2.5(1.2)x Steam Workshop Downloader