Cream Is Approximately 22% Butterfat $8 \mathrm { gal }$ B) $11 \mathrm { gal }$

Multiple Choice

Cream is approximately 22% butterfat. How many gallons of cream must be mixed with milk testing at 2% butterfat to get 90 gallons of milk containing 4% butterfat?

A) $8 \mathrm { gal }$
B) $11 \mathrm { gal }$
C) $$12 \mathrm { gal }$$
D) $7 \mathrm { gal }$
E) $9 \mathrm { gal }$