Question

Could someone show me how to solve this problem? I am trying to do it myself.I just want to make sure I am going about it the right way. Thank you.

z=(SQRTx^2+y^2)

(9)^-3/2

(8)^2/3

Answer 1

9^(-3/2)= 1/(9^3/2)=1/(sqrt 9)^3=1/27