What is the sum of 6 feet 10 inches and 8 feet 9 inches?
a. 14 ft. 7 in.
b. 15 ft. 7 in.
c. 13 ft. 19 in.
d. 15 ft. 19 in

Lets first convert everything to inches.

6 feet= 12*6 = 72 + 10 = 82 inches
8 feet= 12*8 = 96+9 =  105 inches

Now add!

82+105 = 187

Now convert them back to feet.

187/12 = 15 feet

12*15 = 180

187 - 180 = 7 inches

15 feet. 7 inches. 

Final B. 15 ft. 7 in.

1.5 pounds because you put 9over 6 and then divide by 6