Chapter 6.3, Problem 41PPS

To determine

To use: dimensional analysis and the given table to make each conversion.

Answer to Problem 41PPS

The required width of the postcard is $4.2$ inches

Explanation of Solution

Given information:

Given table

Calculation:

Dimensional analysis is the process of including units of measurement as factors when you compute. For example, you know that 1 hour= 60 minutes. You can write conversation factors $\frac{1\text{hour}}{60\text{minutes}}$ or $\frac{60\text{minutes}}{1\text{hour}}$ .

Each ratio is equivalent to 1 because the numerator and denominator represent the same amount.

The below table gives the information about Exchange rates.

Exchange Rates per 1 U.S Dollar
Country	Currency	Rates
European Union	euro	0.729
France	franc	4.784
Japan	yen	122.198
United kingdom	pound	0.494

To convert 150 dollars into euro’s.

From the table

  $\begin{array}{c}1\text{U}\text{.S}\text{.Dollar}\approx \text{0}\text{.729 }\text{euro}\\ \text{150}\text{Dollar}\approx \text{150}\text{Dollar}\cdot \frac{0.729\text{euro}}{1\text{Dollar}}\\ \text{150}\text{Dollar}\approx \text{150}\cancel{\text{Dollar}}\cdot \frac{0.729\text{euro}}{1\cancel{\text{Dollar}}}\\ \text{150}\text{Dollar}\approx 109.35\text{euro}\end{array}$

So, 150 dollars is approximately equals to 109.35 euro’s.