Which of the following graphs could represent a cubic function

Express the following as a function of a single angle, cos(60) cos(-20) - sin(60) sin(-20)

The clayton family’s pool has vertices at the coordinates (0, 2), (0, 5), (2, 5), (2, 6), (5, 6), (5, 1), (2, 1), and (2, 2). if each grid square has an area of 9 square feet, what is the area of the pool?

Use the distance formula to find the distance between (-3,5) and (3,1)