The radius of a circle increases from 2 inches to 3 inches. By how many square inches does its area increase? A)5 pi B)2 pi C)Pi D)pi^2

A)5 pi

Step-by-step explanation:

To get the increase, we must find the area of the circle when the radius was 2 inches and subtract it from the area of the circle when the radius increases to 3 inches. The difference is the increase in the area of the circle.

A circle of radius r has an area A given as

A = Pi r²

Hence when the radius was 2 inches, the area A

= Pi × 2²

= 4 Pi square inches

when the radius increases to 3 inches, the area

= Pi × 3²

= 9 Pi square Inches

The increase in area

= 9 Pi - 4 Pi

= 5 Pi

y = i/2 xtnop + (3i/2 tnop+ 1)

step-by-step explanation:

the picture is the step by step explanation.