The marketing department of a textbook publisher finds that the demand for a book is related to the price according to the formula p=40-√(0.0001x+1),where x is the quantity of books sold (that is,the quantity demanded by the market) at price p.(A)If the demand is 1,000,000 books, what price should the publisher charge for the book? Use correct units in your answer and round your answer to the hundredth's place. (B)If the publisher charges $12.95 per book, how many books would they expect to sell?Use correct units in your answer and round your answer to the one's place.There are 2 parts a and b!Please help!!!! :(

1 answer

what's the trouble? Just plug in your numbers!
p(1000000) = 40-√(0.0001*10^6+1)
= 40-√101
≈ 29.95

If p=12.95,
40-√(0.0001x+1) = 12.95
√(.0001x+1) = 27.05
.0001x+1 = 731.7025
x = 7,307,025
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