Question

1.2.1The winner of a 100 mile race drove his car to victory at a rate of 143.8683 mph. What was his time to the nearest thousandth of an hour)?His time was hours.(Round to the nearest thousandth.)

Answer 1

In order to find the time spent in the race, we need to use the following formula:

`\text{average speed}=\frac{\text{distance}}{\text{time}}`

If the distance of the race is 100 miles, and the average speed is 143.8683 mph, we have that:

`\begin{gathered} 143.8683=\frac{100}{\text{time}} \\ 143.8683\cdot\text{time}=100 \\ \text{time}=(100)/(143.8683) \\ \text{time}=0.695 \end{gathered}`

So the time spent by the winner is 0.695 hours