SOLUTION: The record label uses the following function to model the saled of a new release. a(t)=-90t + 8100t the number of albums sold is a function of time, t, in days. on which day were

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Question 677103: The record label uses the following function to model the saled of a new release.
a(t)=-90t + 8100t the number of albums sold is a function of time, t, in days. on which day were the most albums sold? what is the maximum number of albums sold on that day? I know that the answer is day 45 and 182,250 records. but what work gets me there? I dont know how to get the answer please help!
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
That equation has no maximum and no minimum. The t^2
term is missing