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Mathematics 23 Online
OpenStudy (anonymous):

A bank account will accrue interest as long as the balance remains positive. The account balance is modeled daily by the equation f(t)=-t^2/16=13t=25 where t = 1 represents the balance at the end of day 1. For how long will the account accrue interest? Round up to the nearest day.

OpenStudy (anonymous):

A. 2 days B. 208 days C. 210 days D. 220 days

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