How do you solve r(raised to the third power)=288?

Answer 1

take the cube root of each side
r= cubrt(288)=cubrt(144*2)=cubrt(4*3*3*4*2)
= cubrt(3^2 *2^3*2^2)=2cubrt(36)

check that

Answer 2

You could use this cube root calculator.

http://www.analyzemath.com/Calculators_3/cube_root_calculator.html