Story problem

Question

A football weighs 14 ounces. A carton of footballs weighs 7 pounds. How many footballs are in a carton? 

 

A 12

B 8 

C 7 

D 4

Answer 1

perform dimensional analysis

 

1 lb = 16 oz

 

7 lb × 16oz/1lb        lb cancels out and your left with 7 ×16oz = 112 oz

 

ONE football weighs 14 oz 

 

so, 112 oz / 14 oz     oz cancels out.

 

perform the division and your left with 8

so, there are eight footballs in a carton.