To find out how many miles McKenzie runs in 1 hour, we first need to determine how many 10-minute intervals are in 1 hour.
1 hour = 60 minutes
Number of 10-minute intervals in 60 minutes: \[ \frac{60 \text{ minutes}}{10 \text{ minutes}} = 6 \text{ intervals} \]
Now we know that she runs 1.5 miles in each 10-minute interval. To find the total distance she runs in 60 minutes, we multiply the distance per interval by the number of intervals: \[ 1.5 \text{ miles/interval} \times 6 \text{ intervals} = 9 \text{ miles} \]
Therefore, McKenzie runs 9 miles in 1 hour.
9 mi