Final answer:
There can be a total of 45 4-inch pieces made from five 3-foot long sandwiches after converting the lengths from feet to inches and dividing by the size of the pieces. Hence, a total of 45 pieces can be served from the five 3-foot long sandwiches.
Step-by-step explanation:
The question asks to calculate the number of 4-inch sandwich pieces that can be made from five 3-foot long sandwiches. Firstly, we must convert the total length of sandwiches from feet to inches, since each sandwich will be cut into pieces measured in inches.
There are 12 inches in one foot, so five 3-foot long sandwiches equal 5 x 3 x 12 inches, which is 180 inches of sandwich. If each piece is 4 inches long, we then divide the total length in inches by the length of each individual piece (180 inches ÷ 4 inches). Hence, a total of 45 pieces can be served from the five 3-foot long sandwiches.