Assume that sales revenues, in millions, for Continental Divide Mining can be described by , where t is the number of years past 1992. Use the function to find the maximum revenue. Round your answers to three decimal places.
?

A. Maximum revenue is $9.463 million.
B. Maximum revenue is $5.971 million.
C. Maximum revenue is $3.672 million.
D. Maximum revenue is $3.851 million.
E. Maximum revenue is $16.986 million.

Answer: D

Mathematics

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