15×2 2/3 show the steps too please

Apple pie is removed from 350 degree oven. temperature of the pie t minutes after being removed id given by the function t(t)=72+268e-0.068t

What is the value of x in the following equation. -x ^3/2 = -27

Acd that is originally priced at $15.85 red-tagged for the sale. what is the sale price of the cd