# math

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A circular coffee table has a diameter of 5 ft. What will it cost to have the
top refinished if the company charges \$3 per square foot for the refinishing?

\$15.00?

• math -

Nope.

You need to find the area of the circle.

A = pi * r^2
A = 3.14 * 2.5^2
A = ?

What do you get?

• math -

\$23.55?

or would i take the 2.5^2 and multiply it getting 5 then multiply that by 3.14 which is 15.7 multiplied by 3 equals 47.10

• math -

A = pi * r^2
A = 3.14 * 2.5^2
A = ?

2.5 squared = 6.25

A = 3.14 * 6.25
A = 19.625 square feet

\$3 * 19.625 = \$58.875

Since the company probably rounds up the square feet, your cost would probably be \$60.00.

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