The radius of a basketball is about 3.6 times greater than the radius of a tennis ball how many times greater is the volume of a basketball than a volume of a tennis ball

Volume of a sphere is 
Vbask=4/3 pi (rₐ)^3       where rₐ is the radius of a basketball
v tenn= 4/3 pi (rₓ)^3       where rₓ is the radius of the tennis ball
we know that rₐ=3.6 rₓ

vbasket/v tennis= 4/3pi (3.6 rₓ)^3= we see all is cancelled beside           
                                4/3 pi rₓ
3.6^3=46.65                 
the volume of the basketball is aprox 46.65 bigger than the volume of the tennis ball

Ithink you're supposed to multiply 12.50 which is how much he makes per hour and then multiply it by each number then add whats left togrther and there's your answer