SOLUTION: Solve the equation. A = pi r^2 for r. Find the radius r of the drum. Round to the nearest tenth. A = 153.9"^2

Algebra ->  Equations -> SOLUTION: Solve the equation. A = pi r^2 for r. Find the radius r of the drum. Round to the nearest tenth. A = 153.9"^2       Log On


   

Question 426437: Solve the equation.
A = pi r^2 for r. Find the radius r of the drum. Round to the nearest tenth.
A = 153.9"^2
Found 2 solutions by Alan3354, edjones:
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
r+=+sqrt%28A%2Fpi%29+=+sqrt%28153.9%2Fpi%29
r =~ 6.999 in --> 7.0"

Answer by edjones(8007) About Me  (Show Source):
You can put this solution on YOUR website!
pi*r^2=153.9
r^2=153.9/pi
=49.0
r=7
.
Ed