Suppose that the manufacturer of a gas clothes dryer has found that when the unit price is p dollars, the revenue R (in dollars) is R(p) = - 3p² + 9,000p. (a) At what prices p is revenue zero? (b) For what range of prices will revenue exceed $1,050,000? (a) At what prices p is revenue zero? The revenue equals zero when p is S (Use a comma to separate answers, but do not use commas in any individual numbers.)

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