Terry had 400 inches of ribbon before he cut 20 pieces of ribbon that were each 8 inches long. How many 15-inch pieces can Terry cut from the remaining ribbon? PLEASE HELP ASAP

A: 14
B: 20
C: 16
D: 30

Sera sells t-shirts at the beach. she believes the price of a t-shirt and the number of t-shirts sold are related. she has been experimenting with different prices for the t-shirts. she has collected a data set with five pairs of data; each consists of the price of a t-shirt and the number of shirts sold. the independent variable, which will go on the x-axis, is . the dependent variable, which will go on the y-axis, is the