This preview shows pages 1–2. Sign up to view the full content.
This preview has intentionally blurred sections. Sign up to view the full version.
View Full Document
Unformatted text preview: Name
Homework 4
Section 2.4
Answers for this assignment (numbers 1 and 2) should be in complete, grammatically correct
(English) sentences, and include explanations whenever appropriate. 1. (2ea) An economist is interested in how the price of a certain item aects its sales. At
a price of $p, a quantity q of the item is sold. If q = f (p), determine whether each of the following statements make sense in real world terms. If so, explain what they
mean, if not, say why not.
(a) f (150) = 2000 (b) f (150) = −25 (c) dq
dp (d) = 25
p=150 f (150) = −25 2. (4ea) A company's revenue, R (in thousands of dollars), from sombrero sales, is a function of advertising expenditure, a (in thousands of dollars), so (a) Suppose the company plans to spend about $100, 000 R = f (a). dollars on advertising. If f (100) = 2, should the company spend more or less than $100, 000 on advertising? (b) Suppose the company plans to spend about f (100) = .75, $100, 000 dollars on advertising. If should the company spend more or less than $100, 000 on adver tising? 3. (2ea) For a particular painkiller, the size of the dose,
of the patient, w. Thus, Q = f (w), (a) What are the units of f (b) Rewrite the expression where Q Q, given depends on the weight is in milligrams and w is in pounds. ? f (200) = 2 in the alternative Leibniz notation. ...
View Full
Document
 Spring '08
 KENNEDY

Click to edit the document details