The profit function for a computer company is given by P(x)=−x^2+36x−26 where x is the number of units produced (in thousands) and the profit is in thousand of dollars.
a) Determine how many (thousands of) units must be produced to yield maximum profit. Determine the maximum profit.

(thousands of) units =

maximum profit = thousand dollars
b) Determine how many units should be produced for a profit of at least 40 thousand.

more than (thousands of) units
Thanks so much!

less than (thousands of) units

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  1. take the derivative, set it equal to zero and solve for x
    Plug that x back into P(x) to get your maximum profit.

    b) −x^2+36x−26 ≥ 40
    x^2 - 36x + 66 ≤ 0

    let's use the = sign
    x^2 - 36x + 66 = 0
    use the quadratic formula, you will get two positive x's
    lower ≤ x ≤ larger

    verify your answer by looking at this graph

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