Question

Elena and Linare training for a race. Elena runs her constant speed of 7.5 miles per hour.

Lin's times are recorded every minute:

Time(Minutes) 1, 2, 3, 4, 5, 6, 7, 8, 9,

Distance(Miles) 0.11, 0.21, 0.32, 0.41, 0.53, 0.62, 0.73, 0.85, 1

who finished their mile first?

Answer 1

Lin finished their mile first.

Step-by-step explanation:

Based on the given data, Lin reaches the distance of 1 mile at the 9th minute. Elena runs at a constant speed of 7.5 miles per hour. To determine who finished their mile first, we need to calculate how long it takes for Elena to cover 1 mile at her constant speed.

To convert Elena's speed from miles per hour to miles per minute, we divide her speed by 60, since there are 60 minutes in an hour. So, Elena's speed is 7.5 miles per hour ÷ 60 minutes = 0.125 miles per minute.

Since Elena runs at a speed of 0.125 miles per minute, we can compare her time to Lin's time at the 9th minute to determine who finished their mile first.

Lin reaches a distance of 1 mile at the 9th minute, and Elena's speed is 0.125 miles per minute. Therefore, it takes Elena 1 mile ÷ 0.125 miles per minute = 8 minutes to cover 1 mile. Since Lin reached the 1-mile mark at the 9th minute, it can be concluded that Lin finished their mile first.

Answer 2

Answer: Elena won the race.

Step-by-step explanation:

If you calculate it, Lin runs a mile every 9 minutes.

9 times 7.5= 67.5 which is 1 hour, 7 minutes and 30 seconds. While it took only an hour for Elena to run 7.5 miles.

Which means Elena's speed was faster and got her to the finish line first.