Exercise 25 Page 65

To find the area of a circle, we need the radius of the circle. We know that this circle has a diameter of 6.3ft. By dividing the diameter by 2, we can find the radius of the circle. r=d/2 ⇒ r&=6.3/2 r&= 3.15 m Now, we are able to find its area.

A=π r^2

Substitute

r= 3.15

A=π( 3.15)^2

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Calculate power

NumberToFrac

a = 100* a/100

A=π(315/100)^2

ReduceFrac

a/b=.a /5./.b /5.

A=π(63/20)^2

PowQuot

(a/b)^m=a^m/b^m

A=π*63^2/20^2

CalcPow

Calculate power

A=π*3969/400

Multiply

Multiply

A=3969/400π

The area is 3969600π ft^2.