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Find the interval where the graph of r is concave upward

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Reference no: EM131563220

Question: Effect of advertising on hotel revenue the total annual revenue r of the miramar resorts hotel is related to the amount of money x the hotel spends on advertising its services by the function

R(x) = -0.003x3 + 1.35x2 + 2x + 8000             (0 ≤ t ≤ 400)

Where both r and x are measured in thousands of dollars .

A. Find the interval where the graph of r is concave upward and the interval where the graph of r is concave downward. What is the inflection point of r?

B. Would it be more beneficial for the hotel to increase its advertising budget slightly when the budget is $140,000 or when it is $160,000?

Reference no: EM131563220

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