Answer:
34.8 miles per hour
Explanation:
last month race
1.2 ÷ 2 = 0.6 miles per minute
this month race
2.8 ÷ 5 = 0 .56 miles per minute
to find the average, add 0.6 and 0.56 then divide by 2
(0.6 + 0.56)/2 = 0.58 miles per minute
convert to miles per hour
0.58 x 60 minutes = 34.8 miles per hour