Chapter 1, Problem 17QRT

Interpretation Introduction

Interpretation:

The current world record held by Usain Bolt of Jamaica for $\text{100}\text{m}$ dash is $\text{9}\text{.58}\text{seconds}$.  Whether he could have been arrested for exceeding the speed limit of $\text{25}\text{mi/h}$ has to be calculated.

Concept Introduction:

The conversion of meters to miles is

  $\begin{array}{l}\text{1}\text{m}\text{=}\text{100}\text{cm}\\ \text{1}\text{in}\text{=}\text{2}\text{.54}\text{cm}\\ \text{1}\text{ft}\text{=}\text{12}\text{in}\\ \text{1}\text{mile}\text{=}\text{5280}\text{ft}\end{array}$

The conversion of seconds to hours

  $\text{1}\text{hr=}\text{3600}\text{sec}$