The Polynomial Function $I ( t ) = - 0.1 t ^ { 2 } + 1.9$

question 495

Multiple Choice

The polynomial function $I ( t ) = - 0.1 t ^ { 2 } + 1.9$ 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) 19 yr
• B) 9.5 yr
• C) 8.5 yr
• D) 12.67 yr

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