Answer:
B
45 loaves x 5 cups/loaf = 225 cups
225 cups ÷ 4 cups/pound = 56.25 pounds
So he worked 30.5 hours, he just didn't write some of the hours down. To find the hours he didn't write down, you subtract 8+

+

from 30.5, which equals
Perpendicular lines, when intersecting, will always create a right angle at the intersection point. A right angle is an angle that is exactly 90 degrees.