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18 August, 14:19

The question is:

An accountant finds that the gross income, in thousands of dollars, of a small business can be modeled by the polynomial - 0.3t 2 + 8t + 198, where t is the number of years after 2010. The yearly expenses of the business, in thousands of dollars, can be modeled by the polynomial - 0.2t 2 + 2t + 131.

a. Find a polynomial that predicts the net profit of the business after t years.

b. Assuming that the models continue to hold, how much net profit can the business expect to make in the year 2016?

I know that the equation is - 0.1t^2+6t+67, but i don't know how to find part b.

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  1. 18 August, 14:46
    0
    You are correct, the profit is modeled by:

    -0.1t² + 6t + 67

    We are also told that "t" is the number of years after 2010. So in 2016, the value of t will be 6. We substitute this into the equation we formed:

    -0.1 (6²) + 6 (6) + 67

    = 106.6 thousand dollars
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