Question

a microwave is placed on top of two boxes. One box is 3 feet 7 inches tall, the other box is 4 feet 10 inches tall, and the microwave is 3 feet 9 inches tall. How tall are they combined

Answer 1

It would be 11.7 feet tall

Answer 2

12 inch = 1 foot
3"7 + 4"10 + 3' 9

your answer should be 12 feet 2 inches