Answer: To find Janice's running speed, we need to determine how many miles she runs per hour.
We know that the track is 1/4 mile long and Janice can complete each lap in 1/10 of an hour. To find the total number of miles Janice runs in an hour, we can multiply the length of the track by the number of laps she completes in an hour.
Length of the track * number of laps = total miles
1/4 mile * (1/10 hour)^-1 = total miles
On the second equation, we are using the inverse of the time, to get the number of laps completed in an hour
The speed is distance over time, so we need to express the distance in miles and the time in hours.
So Janice's running speed is 4 miles/hour.
Explanation: