What is the value of f(81)? Picture down below.

Find the value of the variable and the length of each secant segment.

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.

Is this a polynomial function? i need to know asap