Final answer:
To maintain a rate of 7.5 minutes per mile, Randy should try to maintain this pace throughout the 5K race.
Step-by-step explanation:
To find the rate in minutes per mile that Randy should maintain for the 5K race, we need to convert the distance from miles to kilometers since the information about the rate is given in kilometers per hour.
1 mile is approximately equal to 1.61 kilometers. Therefore, a half marathon is 3.1 miles x 1.61 kilometers/mile = 4.991 kilometers.
If Randy wants to complete the 5K race in 1 hour, we need to convert the time from hours to minutes. 1 hour is equal to 60 minutes.
Now, we can calculate the rate in minutes per mile that Randy should maintain:
Rate = Time / Distance = 60 minutes / 4.991 kilometers = 12.02 minutes per kilometer = 7.5 minutes per mile