Question

If the area of a circle is found using A=πr2, find r if the area is 25in2 and using pi equals 3.14

Please help

Answer 1

r = 2.8 in ( to 1 dec. place )

Explanation:

substitute the given values into the formula

25 = 3.14r² ( divide both sides by 3.14 )

r² =
`(25)/(3.14)` ( take the square root of both sides )

r =
`\sqrt{(25)/(3.14) }` ≈ 2.8 in