The double number line shows the approximate number of ounces in a certain number of pounds: Two number lines are shown. The one on top is labeled pounds and has tick marks labeled 3, 4, and 5 with secondary tick marks in between. The one on bottom is labeled ounces and has tick marks labeled 40, 56, and 72 with secondary tick marks in between. The first tick mark on pounds lines up vertically with the first secondary tick mark on the ounces line, and the remaining tick marks all line up. Based on the number line, about how many ounces are there in 7 pounds? (1 point) a 96 ounces
b 112 ounces
c 128 ounces
d 144 ounces