Different ways to order rational numbers?

What values of c and d make the equation true?

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.