Final answer:
Mai will take 6.4 minutes to complete 4 laps of a 400-meter track if she runs at a constant speed of 250 meters per minute by multiplying the number of laps by the length of the track and dividing by her speed.
Step-by-step explanation:
To determine how many minutes it takes Mai to complete 4 laps of the track at a constant speed of 250 meters per minute, we can use the following steps:
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- First, calculate the total distance Mai must run for 4 laps. Since one lap is 400 meters, four laps would be 4 × 400 meters = 1600 meters.
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- Next, divide the total distance by Mai's running speed to find the time in minutes. Therefore, 1600 meters / 250 meters per minute = 6.4 minutes.
Thus, it will take Mai 6.4 minutes to complete 4 laps of the track.