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Mathematics 15 Online
OpenStudy (anonymous):

A bakery charges twenty cents for a cookie that is 2 inches in diameter. If the price is proportional to the area, how much do they charge for an extra large cookie that is 6 inches in diameter? Assume that each cookie is shaped of a circle. sixty cents one dollar and twenty cents one dollar and eighty cents five dollars and forty cents

OpenStudy (anonymous):

Are you doing a test?

OpenStudy (anonymous):

Your questions are coming sporadically, and it's my assumption

OpenStudy (anonymous):

no practice

OpenStudy (anonymous):

A practice test?

OpenStudy (anonymous):

no prctice homwworck

OpenStudy (anonymous):

This is a simple question. If a cookie that is 2 inches is $.20

OpenStudy (anonymous):

6 inches is 3 times more than 2

OpenStudy (anonymous):

Basically, you're going to get your .20 and multiply it by 3

OpenStudy (anonymous):

This gets you A, or .60

OpenStudy (anonymous):

ok?

OpenStudy (anonymous):

?

OpenStudy (radar):

Let's think a little more about this......

OpenStudy (radar):

If the radius went from 1 for the small cookie to 3 for the large cookie and we are dealing with increase in Area, Since area is dependent on r^2 how much has the area increased.

OpenStudy (radar):

I am thinking more like a $1.80

OpenStudy (anonymous):

no i was thinking 1.50

OpenStudy (radar):

Since the radius tripled, the area would be increased by 3 squared or nine.

OpenStudy (radar):

Note you don't have to calculate the actual area, just deal with the radius increase and the fact A=pi*r^2.

OpenStudy (radar):

Think some more.

OpenStudy (radar):

As I said think some more before you close a question lol.

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