Profit A frozen yogurt stand makes a profit of P(x) = .40x −80 dollars when selling x scoops of yogurt per day.
(a) Find the break-even sales level, that is, the level at which P(x) = 0.
(b) What sales level generates a daily profit of $30?
(c) How many more scoops of yogurt will have to be sold to raise the daily profit from $30 to $40?
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