Mel spent $12.50 buying apples. The apples cost $2.50 per pound. Which equation can be used to find, the number of pounds of apples Mel bought, and how many pounds of apples did he buy?

a
2.50 + p = 12.50 He bought 10 pounds of apples.
b
12.50 + p = 2.50 He bought 10 pounds of apples.
c
2.50p = 12.50 He bought 5 pounds of apples.
d
12.50p = 2.50 He bought 0.2 pounds of apples.