Question

Tatiana ran the marathon with an average speed of 0.09 miles per minute. What was her speed to the nearest mile per hour?
5 miles per hour
7 miles per hour
9 miles per hour
11 miles per hour

Answer 1

To convert Tatiana's speed from miles per minute to miles per hour, we can use the following conversion:

1 hour = 60 minutes.

To convert her speed from miles per minute to miles per hour, we multiply by 60:

\[
\text{Speed in miles per hour} = \text{Speed in miles per minute} \times 60
\]

Substituting in Tatiana's speed:

\[
\text{Speed in miles per hour} = 0.09 \, \text{miles/min} \times 60 \, \text{min/hour} = 5.4 \, \text{miles/hour}
\]

When rounding 5.4 to the nearest mile per hour, we get 5 miles per hour.

Therefore, Tatiana's speed to the nearest mile per hour is **5 miles per hour**.