Whats the set builder notation of 1,2,4,8,16,32,64

The parabola opens: y=√x-4 (principal square root) up down right left

Atriangle has an area of 72 square inches. if the base of the triangle has a length of 18 inches, what is the height of the triangle? use the formula for the area of a triangle: area = (base)(height) type a numerical answer in the space provided. do not include the units or spaces in your answer.

Ijust need to see how to do this. so you don’t have to answer all of them just a step by step explanation of one.