Question

A bakery made 200 cakes in preparation for an upcoming holiday. Each cake was made from 4.5 cups of batter and 3.5 cups of frosting. Which of the following shows the number of cups of batter, b(f) , the bakery used as a function of the f cups of frosting that the bakery used?

A. b(f)= 7/9 f
B. b(f)= (200-7f)/9
C. b(f)= 9/7 f
D. b(x) = 200-9f/7

Answer 1

Explanation:

The ratio of batter to frosting is 4.5:3.5.

Multiply ratio by two and you get 9:7

Answer: C b(f)=9/7 f

Answer 2

3.5 cups batter/4.5 cups frosting = 7/9

b(f) = (7/9)f

The correct answer is A.