Solve the problem.
-The polynomial $-0.1 t^{2}+2 t$ represents the yearly income (or loss) from a real estate investment, where $t$ is time in years. After what year does income begin to decline?
A) year 13.33
B) year 10
C) year 9
D) year 20

Question

Quizplus · Accepted Answer

The income begins to decline when the derivative of the polynomial is zero. The derivative is $-0.2t + 2$. Setting it to zero gives $t = 10$.

Solve the Problem −0.1t2+2t-0.1 t^{2}+2 t−0.1t2+2t Represents the Yearly Income (Or Loss) from a Real Estate

Solve the Problem $-0.1 t^{2}+2 t$ Represents the Yearly Income (Or Loss) from a Real Estate