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3 years ago

10

Find the area of the semicircle.

1 answer:

Oliga [24]3 years ago

7 0

So since this is half a circle, we have to divide the area of a circle by 2. So that would give us 1/2 pi* r^2. We find the radius by dividing 10 by 2. So the radius is 5. Plugging that in for r in 1/2(pi)(r^2) we get 1/2(pi)(5^2) which is 25pi/2. Turning pi into 3.14 we have (25(3.14))/2 which is 78.5/2 which is approximately 39.25 units^2

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ludmilkaskok [199]

Answer:

The equation needed is $\textrm{Cost of 1 ream of paper} = \frac{20}{5}$

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Step-by-step explanation:

Here, the cost of 5 reams of paper = $ 21

The tax on her purchase = $1

So, the actual cost of 5 reams of paper = Total Cost paid - Tax amount

= $ 21 - $ 1 = $20

So, the actual cost of 5 reams of the paper is $20.

Now, to find out the cost of 1 ream of paper:

$\textrm{Cost of 1 ream of paper} = \frac{\textrm{Total amount paid for 5 reams}}{\textrm{ 5}} \\= \frac{20}{5} = 4$

= $4

Hence, the cost of each ream of paper = $ 4.

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Step-by-step explanation:

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Answer:

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