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anonymous

  • 5 years ago

An appliance store manager estimates that for x television ads run per day, R(x)=-0.01x^3+x^2-3x+200 refrigerators will be sold per month. Find R'(4) and interpret what it tells us about sales. My answer was for every 4 TV adds, 1.16 refrigerators will be sold. Is this correct?

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  1. anonymous
    • 5 years ago
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    start with the R' R'(x)= -.03x^2+2x-3 so R'(4) = -.03(4)^2+2(4)-3 = 4.52 The function of refrigerators sold per month with x being the number of add run per day, so its derivative would be how many more refrigerators are sold (not the abolute number of fridges sold) with a change in adds per day (the slope of the fridge per ad function at a given level of adds). .

  2. anonymous
    • 5 years ago
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    Thanks

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