Posted by **TANGIE** on Thursday, December 2, 2010 at 10:39pm.

A CIRCULAR COFFEE TABLE HAS A DIAMETER IF 5FT. WHAT WILL THE COST BE TO BE REFINISHED IF THE COMPANY CHARGES $3.00 PER SQUARE FOOT?

A+=+pi%2Ar%5E2

r+=+2.5

A+=+pi%2A2.5%5E2

A+=+pi%2A6.25

A+=+19.635 ft2

If cost = C

C+=+3%2A19.635

C = $58.90 answer

- MATH -
**MathMate**, Thursday, December 2, 2010 at 11:05pm
Correct!

Note that the area of a circle can be

either

πr² or πd²/4

Total cost

=πr²*($3)

=π(d²/4)*($3)

- MATH -
**TANGIE**, Friday, December 3, 2010 at 12:12am
Thank you MathMate,

you're a life saver

- MATH -
**MathMate**, Friday, December 3, 2010 at 8:46am
I love those candies with a hole in the middle! :)

http://img686.imageshack.us/img686/8472/lifesavercandies.jpg

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