Answer:
To find Susan's speed in miles per hour, divide the distance she ran (2.75 miles) by the time it took her (1/4 of an hour).
Speed = Distance / Time
Speed = 2.75 miles / (1/4) hour = 2.75 * 4 = 11 miles per hour.
To calculate how long it will take Susan to go 3.5 miles at this speed, divide the distance (3.5 miles) by her speed (11 miles per hour).
Time = Distance / Speed
Time = 3.5 miles / 11 miles per hour ≈ 0.318 hours.
Converting 0.318 hours to minutes: 0.318 * 60 = 19.08 minutes.
So, it will take Susan approximately 19.08 minutes to go 3.5 miles at this speed.
