SOLUTION: 4. The polynomial function I(t) = -0.1t2 + 1.9t represents the yearly income (or loss) from a real estate investment, where t is time in years after 1970. During what year is the m

Algebra ->  Quadratic Equations and Parabolas -> SOLUTION: 4. The polynomial function I(t) = -0.1t2 + 1.9t represents the yearly income (or loss) from a real estate investment, where t is time in years after 1970. During what year is the m      Log On


   

Question 879530: 4. The polynomial function I(t) = -0.1t2 + 1.9t represents the yearly income (or loss) from a real estate investment, where t is time in years after 1970. During what year is the maximum income occur?
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
I(t) = -.1(t - 9.5)^2 + 9.025
1970 + 9.5 = 1980, the maximum income occur