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The polynomial function I(t)=-0.1t^2+1.6t represents the yearly income (or loss) from a real estate investment, where t is the time in years. After what year does income begin to decline?

Respuesta :

jingle535
Using a graphing calculator you can find that the maximum is 6.4, so the income starts to decline at the t value for 6.4, which is 8.

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