Question

Sissy is baking cookies for her class party. She plans to bake 128 cookies. Her recipe makes 6 dozen cookies. If

her recipe calls for 3 #$ c flour, how
much flour will she need to make 128 cookies? (round to the nearest half cup)
A. 5 1/2 c
B. 4c
C. 4 1/2 c
D. 6c

Answer 1

A. 5 1/2 c

Explanation:

Sissy recipe will make 6 dozen cookies from 3 cups of flour. That mean, the number of cookie per cup of flour will be:

6 * 12 cookies / 3 cup of flour = 72/3 cookie/c flour = 24 cookie/cup flour.

If she wants to make 128 cookies, the amount of flour she needs will be:

128 cookies / (24 cookie/cup flour)= 5.33 cup flour = 5.5 cup flour (rounded up to 0.5 since its above 0.25)