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topjm [15]
3 years ago
14

The tip of a windshield wiper travels a distance of 31 inches in one 90 revolution. What is the

Mathematics
1 answer:
Allushta [10]3 years ago
3 0

Answer:

Option F, 10 inches.

Step-by-step explanation:

For a circle of radius R, the perimeter is:

P = 2*pi*R

such that pi = 3.14

If we have a section of that circle defined by an angle θ, the length of the arc is:

A = (θ/360°)*P =  (θ/360°)* 2*pi*R

In this case, we have a circle whose radius is defined by the length of the windshield wiper.

We also know that in one 90° revolution (so it travels the length of the arc of 90° two times) the tip travels a distance of 31 in.

Then:

A = 2*[(90°/360°)*2*3.14*R] = 31in

We need to solve this for R.

R = 31in/( 2*(90°/360°)*2*3.14) = 9.8in

We can round this to the next whole number:

R = 10in

The correct option is F.

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Answer:

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Step-by-step explanation:

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3 years ago
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Josh had to make 2,000 cookies for his bakery. 2 pieces of wheat make 8 cookies. How much wheat does he need?
Licemer1 [7]
Answer: 500 pieces of wheat

Explanation:

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We need to find how much wheat he needs for 2,000 cookies.
We need to assign a variable for wheat
Wheat = W
If Josh needs to make 2,000 cookies he would need W amount of wheat
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Isolate the variable:
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W = 500


4 0
2 years ago
What combination of variables could you analyze using correlation?
Anon25 [30]

Answer:

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Step-by-step explanation:

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3 years ago
Simplify:(2x+y-z)^2-(2x+y+z)^2
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