I need help on this queston

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

Amanufacturer knows that their items have a normally distributed lifespan, with a mean if 9.1 years, and standard deviation of 2.9 years. if you randomly purchase one item, what is the probability it will last longer than 10 years?

Darcy bought 1/2 pound of cheese and 3/4 pound of hamburger for a barbecue. use the numbers to compare the amounts of cheese and hamburger darcy bought.