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Mathematics 19 Online
OpenStudy (anonymous):

There's cookies Jennifer makes large cookies. These cookies are 14 inches in diameter. How much icing will she need to cover the top of each cookie? Answer 14π in2 49π in2 7π in2 196π in2

OpenStudy (pfenn1):

Do you know the formula to figure out the area of a circle with the diameter of 14 inches?

OpenStudy (anonymous):

err.. no

OpenStudy (pfenn1):

\[A=\pi r^2\]where r is the radius

OpenStudy (anonymous):

Just to clarify, it would 3.14 * 7^2 right?

OpenStudy (anonymous):

be*

OpenStudy (pfenn1):

yes

OpenStudy (anonymous):

hmm.. the answer i get does not match with any of the answers above :/

OpenStudy (pfenn1):

The answers assume that you don't multiply by pi. So what is your answer for pi * 7^2?

OpenStudy (anonymous):

Ah, ok so it is 49π in2?

OpenStudy (pfenn1):

yep

OpenStudy (anonymous):

aight, thanks for your help!

OpenStudy (pfenn1):

you're welcome

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