SOLUTION: What is the approximate area of a circle with a circumfrence of 15 in.?

Question 848646: What is the approximate area of a circle with a circumfrence of 15 in.?
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
What is the approximate area of a circle with a circumference of 15 in.?
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First use the circumference to find the radius

... I'll leave it in its exact form.

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Now use this radius to find the area

<--- This is the exact area in terms of

<--- This is the approximate area, which is the final answer* they want.

Notes:

* Be sure to follow any rounding rules given (eg: "round to the nearest hundredth")

* Much of this problem can be done without a calculator, but you will need a calculator for that last step (to get the approximate answer).

* The units of the final answer are "square inches"
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