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slavikrds [6]
3 years ago
13

Use the ratio table to determine how many people 13 subs would serve. Explain look at the photo

Mathematics
2 answers:
ss7ja [257]3 years ago
8 0

Answer:

13 subs will serve 52 people.    

Step-by-step explanation:

We are given the following information in the question:

Number of subs:     3       5        8

 People served:      12     20     32

We have to find that how many people with be served by 13 subs.

We can solve this question with the help of ratio.

\text{Ratio} = \displaystyle\frac{\text{Number of subs}}{\text{People served}}\\\\= \frac{3}{12} = \frac{1}{4}

The obtained ratio is 1:4, which means that 1 sub can serve 4 peoples.

Let x be the number of people served by 13 subs:

\displaystyle\frac{1}{4} = \frac{13}{x}\\\\\Rightarrow x = \frac{13\times 4}{1} = 52

Hence, 13 subs will serve 52 people.

adoni [48]3 years ago
5 0
I think its 44. The amount of people increase by 12 every time you add more subs. Hope that helps!
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Answer:

B. Stratified sampling, because there are specific subgroups to investigate.

Step-by-step explanation:

Stratified Sampling is a sampling method and is used when the population has subgroups with different characteristics. Random sampling is applied in each of the sub-groups <em>proportional </em>to their size and then these samples <em>combined </em>together to create sample of the study.

Since there are three towns with people from different occupations ( retirees,business owners, office workers), it is better to use stratified sampling method.

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3 years ago
How many students voted
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Answer:

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3 years ago
You're standing on the ground 7777 meters away from the bottom of a tall tower. The tower itself is 346346 meters tall. What is
lys-0071 [83]

Answer:

88.7°

Step-by-step explanation:

First, visualize. Assuming that the tower is at a perfectly 90° angle to the ground, you have a right triangle. We will call this triangle ΔABC where A is where you are, B is the top of the tower, and C is the base of the tower. Now we know the following:

∠A = ?

∠B = ?

∠C =  90

a = 346346

b = 7777

c = ?

Note: Triangles are labeled with three pairs of letters: a, b and c and A, B and C. The lower case letters, a, b and c represent the sides, and the upper case letters are the angles that are directly opposite of those sides. (see attached reference)

c is easy, c is the hypotenuse, so you can use the following equation to find the hypotenuse:

a² + b² = c²

Rearranged:

c = ± \sqrt{a^{2} +b^{2} }

Substitute a and b:

c = ±\sqrt{346346^{2} +7777^{2} }

Comes out to ~346433.3 meters.

Now if we use the Law of Sines:

\frac{a}{sinA} = \frac{b}{sinB} = \frac{c}{sinC}

We can use c and a, since we're trying to find what angle A is, so the ratio is set up as:

\frac{346346}{sinA} = \frac{346433.3}{sinC}

Well we know that C = 90, and so sin(90) in degrees (as opposed to radians) is 1. So then the set of equations is now:

\frac{346346}{sinA} = \frac{346433.3}{1}

Cross Multiply to get rid of the fractions:

346346 = 346433.3 * sin(A)

Divide:

\frac{346346}{346433.3} = sin(A)

Using a calculator, if you take the arcsin of that fraction, you will get what angle A is supposed to be:

arcsin( \frac{346346}{346433.3} ) = ∠A = 88.7°

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The end point of a ray is A

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Since the slope of a vertical line is undefined, is it possible ofr vertical lines to be parallel?
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