An in-ground swimming pool often has steps that are made from poured concrete. In the sketch of the steps below, the steps are identical, each measuring 19 inches from side to side, 11 inches from front to back, and 7 inches tall. Calculate the amount of concrete that is needed to form the steps. 19 in.11 in.7 in. The amount of concrete for the steps is cubic inches.

Aretha wanted to gather data about the cost of local bowling leagues in her area. she plotted the data and determined that the average bowling league costs consist of a one-time registration fee and a monthly fee modeled by the equation y = 15x + 20. identify and interpret the y-intercept in this model. the y-intercept is 20. this is the cost per month. the y-intercept is 20. this is the cost of registration. the y-intercept is 15. this is the cost of registration. the y-intercept is 15. this is the cost per month.