Answer:
4/5 of a minute (48 seconds)
Explanation:
Pierce swims 10 laps in 8 minutes. This means that the time it takes for him to swim each lap is 8 minutes divided by 10 laps (because that's the total time, and you split it amongst the ten laps). 8/10 simplified is 4/5 (divide numerator and denominator by 2). Hope that helps!