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4th Edition

James Stewart

Publisher: Cengage Learning

ISBN: 9781337687805

Chapter 2.6, Problem 43E

**i.**

To determine

The average rate of cell phone growth from

Expert Solution

**Given information:**

The number N of US cell phone subscribers (in millions) is shown in table.

**Calculations:**

Here the growth of cell phone users from

Thus the average growth of cell phone users from

Here the growth of cell phone users from

Here the average growth of cell phone users from

Therefore the average rate of cell phone growth from

**ii. **

To determine

The average rate of cell phone growth from

Expert Solution

**Given information:**

The number N of US cell phone subscribers (in millions) is shown in table.

**Calculations:**

The number of cell phone subscribers in

The number of cell phone subscribers in

Thus the growth of cell phone users from

Thus the average growth of cell phone users from

**iii.**

To determine

The average rate of cell phone growth from

Expert Solution

**Given information:**

The number N of US cell phone subscribers (in millions) is shown in table.

**Calculations:**

The number of cell phone subscribers in

The number of cell phone subscribers in

Thus the growth of cell phone users from

Thus the average growth of cell phone users from

**iv.**

To determine

The instantaneous rate of growth in

Expert Solution

**Given information:**

The number N of US cell phone subscribers (in millions) is shown in table.

**Calculations:**

Thus the average growth of cell phone users from

Therefore the instantaneous rate of growth in

**v.**

To determine

The instantaneous rate of growth in

Expert Solution

**Given information:**

The number N of US cell phone subscribers (in millions) is shown in table.

**Calculations:**

Thus the average growth of cell phone users from

The slope of the tangent is given the formula,