Simplify the expression ((1/2) to the third power) to the third power

An architect is designing a water fountain for a park she uses the given function to model the water jet flowing from the fountain nozzles where h(x) gives the height of the water jugs in feet x feet from the starting point h(x)=-1/20x+x+15

Gabrielle's age is two times mikhail's age. the sum of their ages is 84. what is mikhail's age?

Erik buys 2.5 pounds of cashews. if each pound of cashews costs $7.70, how much will he pay for the cashews?