Chapter 2.3, Problem 2.3P

(a)

Interpretation Introduction

Interpretation:

The number of significant figures in $\text{4}\text{.5}$ has to be given.

Concept Introduction:

Significant figures:  The digits that are measured in a number including one estimated digit are called as significant figures.

All nonzero digits are always significant.

Exact numbers are always significant.

Rules for determining when a zero is a significant figure:

Rule 1:  A zero is considered as a significant figure when it is seen between two nonzero digits and at the end of a number with a decimal point.

Rule 2  A zero is not considered as a significant figure when it is seen at the beginning of a number and the end of a number, which does not contain a decimal point.

(b)

Interpretation Introduction

Interpretation:

The number of significant figures in $\text{3}\text{.025}\text{feet}$ has to be given.

Concept Introduction:

Refer to part (a).

(c)

Interpretation Introduction

Interpretation:

The number of significant figures in $\text{125}\text{.0}\text{meters}$ has to be given.

Concept Introduction:

Refer to part (a).

(d)

Interpretation Introduction

Interpretation:

The number of significant figures in $\text{0}\text{.001}\text{mile}$ has to be given.

Concept Introduction:

Refer to part (a).

(e)

Interpretation Introduction

Interpretation:

The number of significant figures in $\text{25}\text{.0 grams}$ has to be given.

Concept Introduction:

Refer to part (a).

(f)

Interpretation Introduction

Interpretation:

The number of significant figures in $\text{12}\text{.20}\text{liters}$ has to be given.

Concept Introduction:

Refer to part (a).

(g)

Interpretation Introduction

Interpretation:

The number of significant figures in $\text{100,000}$ people has to be given.

Concept Introduction:

Refer to part (a).

(h)

Interpretation Introduction

Interpretation:

The number of significant figures in $\text{205}$ birds has to be given.

Concept Introduction:

Refer to part (a).