<PRE><B>Question 267795</B>
The cost for burning a 75 watt bulb is given by the function c(h) = 0.0055h, where h represents the number of hours that the bulb burns.
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(a) How much does it cost to burn a 75 watt bulb for 3 hours per night for a 28 day month? Express your answer to the nearest cent.
c(3*28) = 0.0055(3*28) = $0.462
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(b) Graph the function c(h) = 0.0055h. (Do this on paper. Your instructor may ask you to turn in this graph.)
{{{graph(400,300,-5,500,-5,4,0.0055x)}}}
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(c) Use the graph in part (b) to approximate the cost of burning a 75 watt bulb for 295 hours. (Express your answer to the nearest tenth of dollar.)
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(d) Use c(h) = 0.0055h to find the exact cost, to the nearest cent, of burning a 75 watt bulb for 295 hours.
c(295) = 0.0055(295) = $1.62
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Cheers,
Stan H.
$ 
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