SOLUTION: Tina's circular glass table in her tv room has a area of 169Pi square inches. She wants to put a protective rubber border around the edge of the table for her child. How much meter

Algebra ->  Test -> SOLUTION: Tina's circular glass table in her tv room has a area of 169Pi square inches. She wants to put a protective rubber border around the edge of the table for her child. How much meter      Log On


   

Question 391523: Tina's circular glass table in her tv room has a area of 169Pi square inches. She wants to put a protective rubber border around the edge of the table for her child. How much meterial in inches does she need to buy
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
Tina's circular glass table in her tv room has a area of 169Pi square inches.
She wants to put a protective rubber border around the edge of the table for her child.
How much material in inches does she need to buy.
:
Use the Area equation [A+=+pi%2Ar%5E2] to find the radius
pi%2Ar%5E2 = 169%2Api
Divide both sides by pi
r^2 = 169
r = sqrt%28169%29
r = 13 inches is the radius
:
Find the circumference [C+=+2%2Api%2Ar}
C = 2%2Api%2A13
C = 81.68 inches, she should buy at least 82 inches (If it's sold by the foot, get 7 ft}