math
posted by Diana .
the inventor charges $4.00 per unit, then her profit for producing and selling x units is given by the function P(x) = 2.25x  7000
(a) What is her profit if she sells 2000 units?
(b) What is per profit if she sells 5000 units?
(c) What is the breakeven point for sales?
(a) Substitute 2000 for x in the equation for P(x). That will be the profit.
(b) ditto
(c) Set P(x) = 0 and solve for x. That is the number of sales needed to break even.
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