The cost for the raw materials of marble countertops, c , can be represented by the function c times A is equal to 4 point 2 5 A , where A is the area of the countertops. The retail markup, m , can be represented by the function m times c is equal to 1 point 1 5 c Which function can be used to find the marked-up price of a marble countertop depending on the area?
Answer
A
m times open paren c times A close paren is equal to 5 point 4 A
B
m times open paren c times A close paren is equal to 3 point 1 A
C
m times open paren c times A close paren is equal to 3 point 6 9 5 7 A
D
m times open paren c times A close paren is equal to 4 point 8 8 7 5 A
Explanation
The raw-material cost for an area of A is c(A) = 4.25A. Apply the retail markup by multiplying that cost by 1.15: m(c(A)) = 1.15(4.25A) = 4.8875A. So the marked-up price is represented by m(c(A)) = 4.8875A, choice D.
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