Solve the problem.Assume the price per unit of a certain commodity rose sharply and then came back down between 1975 and 1990. The cost of one unit of the commodity can be approximated by the function  where P is the price of one unit of the commodity (not adjusted for inflation) and t is the number of years after 1975.(a) What was the price per unit of the commodity in 1975?(b) How many years, to the nearest tenth, after 1975 did the price reach its maximum?(c) What was the highest price per unit during this time?(c) Find the price per unit of the commodity in 1979.

A. (a) $3.32
(b) 12.4 yr
(c) $47.90
(d) $33.30
B. (a) $3.32
(b) 11.3 yr
(c) $47.90
(d) $29.32
C. (a) $3.32
(b) 11.3 yr
(c) $51.01
(d) $33.30
D. (a) $3.32
(b) 12.4 yr
(c) $51.01
(d) $29.32


Answer: B

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