A machine fills a bag with 7 ounces of potato chips in 3.5 seconds. At this rate, how many seconds will take the machine to fill a bag with 15 ounces of potato chips?
A
6.5
B
7.0
C
7.5
D
8.0
Correct Answer: 7.5
Filling rate = 7/3.5 = 2 ounces per second Time required = 15/2 = 7.5 seconds