The surface area of the top surface of the water in a circular swimming pool is about 20 square feet. Estimate the radius of the pool, to the nearest foot.
A.14feet B.8feet C.11feet D.10feet

Question

The surface area of the top surface of the water in a circular swimming pool is about 20 square feet. Estimate the radius of the pool, to the nearest foot.
A.14feet  B.8feet  C.11feet  D.10feet

mertsj · Answer

Remember the area formula:  A = pi(r^2)

callisto · Answer

let x be the radius.
(pi) (x^2) = 20
x^2 = 6.366197724
x = 2.52 feet or x=-2.52 feet (rejected)
@@..  not from the choice you gave us