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4th Edition

James Stewart

Publisher: Cengage Learning

ISBN: 9781337687805

Chapter 2.6, Problem 50E

(a)

To determine

The meaning of

Expert Solution

**Given:**

Consider the function *p* dollars per pounds. That is

Note that, the derivative *x*

The derivative *p* dollars per pounds.

The derivative

The instantaneous rate of change is equal to

Here

Thus, the units are pounds per dollars.

(b)

To determine

**To explain:** Whether

Expert Solution

The derivative

Since the quantity of coffee is sold is decrease when the price is increasing.

If price is 8 dollars, then the quantity of coffee sold will decreasing.

Thus, the value