Concept explainers
Internet Purchases An Internet bookstore charges $15 shipping for orders under $100 but provides free shipping for orders of $100 or more. The cost C of an order is a function of the total price x of the books purchased, given by
- (a) Find C(75), C(90), C( 100), and C(105).
- (b) What do your answers in part (a) represent ?
(a)
To find: The internet bookstore charges at given orders.
Answer to Problem 77E
Internet bookstore charges at order
Explanation of Solution
The given function is,
Function for order
Substitute
So, internet bookstore charges at order
Function for order
Substitute
So, internet bookstore charges at order
Function for order
Substitute
So, internet bookstore charges at order
Function for order
Substitute
So, internet bookstore charges at order
Hence, internet bookstore charges at order
(b)
To explain: Answer represent in part (a).
Answer to Problem 77E
There are no shipping charges at order $100 or more than $100.
Explanation of Solution
From part (a),
Internet bookstore charges at order
There are no shipping charges at order $100 or more than $100.
Chapter 2 Solutions
Precalculus: Mathematics for Calculus - 6th Edition
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Precalculus: A Unit Circle Approach (3rd Edition)
Precalculus: Concepts Through Functions, A Unit Circle Approach to Trigonometry (4th Edition)
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