Answer:
12mph
Explanation:
1. calculate Steve's initial running speed. he can run 3.5 miles in 30 minutes. To find his speed, convert the time to hours by dividing it by 60: 30 minutes ÷ 60 = 0.5 hours.
2. calculate Steve's initial running speed in mph by dividing the distance (3.5 miles) by the time (0.5 hours): 3.5 miles ÷ 0.5 hours = 7 miles per hour.
3. add 12 to his initial speed: 7mph + 12mph = 19mph
4.multiply his speed (19mph) by the time (2 hours): 19 miles per hour × 2 hours = 38 miles.
Therefore, Steve will run 38 miles in 2 hours after increasing his speed by 12mph