The question is:

The revenue (in dollars) from the dale of "x" dinners is given by:

R (x) = -0.00000183x^3 - 0.00029532x^2 + 30.1898x

and the cost (in dollars) of producing "x" dinners is given by the

function:

C (x) = -0.001x^2 + 11x + 13000

a) I need to find an

equation for profit as a function of the number of dinners sold.

this is easy ... Profit = Revenue - Cost
b) I need to find the profit when 2300 dinners are sold.

evaluate your profit function found in part a) for x = 2300
c) I need to use a derivative to find how many dinners need to be sold to maximize profit. What is the maximum profit?

take the derivative of your profit function, set it equal to 0, and maximize
K

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