SAT problem
18. The price of corn meal is d dollars for 12 ounces and each ounce makes c squares of cornbread. In terms of c and d, what is the dollar cost of the corn meal required to make 1 square of cornbread?
(A) dc/12
(B) 12/dc
(C) d/12c
(D) c/12d
(E) 12dc

Question

SAT problem
18. The price of corn meal is d dollars for 12 ounces and each ounce makes c squares of cornbread.  In terms of c and d, what is the dollar cost of the corn meal required to make 1 square of cornbread?
(A) dc/12
(B) 12/dc
(C) d/12c
(D) c/12d
(E) 12dc

mertsj · Answer

$$1sq \times \frac{1oz}{c squares}\times \frac{d dollars}{12 oz}= \frac{d}{12c} dollars$$