Chapter 1, Problem 1.68P

(a)

Interpretation Introduction

Interpretation:

Whether the statement “Angel Falls is $\text{3212 ft}$ high” include an exact number or not is to be determined.

Concept introduction:

A number with no uncertainty and that has a certain value is called an exact number. It has an infinite number of significant figures and does not limit or affect the number of significant figures in the final answer of the calculation.

For an example $\text{1 dozen}$ of bananas is an exact number because in $\text{1 dozen}$ of bananas there are exactly 12 bananas.

(b)

Interpretation Introduction

Interpretation:

Whether the statement “there are 8 known planets in the solar system” include an exact number or not is to be determined.

Concept introduction:

A number with no uncertainty and that has a certain value is called an exact number. It has an infinite number of significant figures and does not limit or affect the number of significant figures in the final answer of the calculation.

For an example $\text{1 dozen}$ of bananas is an exact number because in $\text{1 dozen}$ of bananas there are exactly 12 bananas.

(c)

Interpretation Introduction

Interpretation:

Whether the statement “there are $453.59\text{ g}$ in $1\text{ lb}$” include an exact number or not is to be determined.

Concept introduction:

A number with no uncertainty and that has a certain value is called an exact number. It has an infinite number of significant figures and does not limit or affect the number of significant figures in the final answer of the calculation.

For an example $\text{1 dozen}$ of bananas is an exact number because in $\text{1 dozen}$ of bananas there are exactly 12 bananas.

(d)

Interpretation Introduction

Interpretation:

Whether the statement “there are $1000\text{ mm}$ in $1\text{ m}$” include an exact number or not is to be determined.

Concept introduction:

A number with no uncertainty and that has a certain value is called an exact number. It has an infinite number of significant figures and does not limit or affect the number of significant figures in the final answer of the calculation.

For an example $\text{1 dozen}$ of bananas is an exact number because in $\text{1 dozen}$ of bananas there are exactly 12 bananas.