<PRE><B>Question 1005372</B>
Your company uses the quadratic model y = -4.5x2 + 150x to represent the average number of new customers who will be signed on (x) weeks after the release of your new service. How many new customers can you expect to gain in week 18? 
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y = -4.5x^2 + 150x
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f(18) = -4.5*18^2 + 150*18
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f(18) = -1458 + 2700
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f(18) = 1242
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Cheers,
Stan H.
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