Answer:
r = 40 miles / hour
Explanation:
Formula
d = r * t
Givens
d = 16 miles
t = 24 minutes = 24/ 60 minutes in an hour = 0.4 hours
r = ???
Substitute and solve
16 miles = r * 0.4 hours Divide by 0.4
16/0.4 = r Switch sides
r = 16/0.4
r = 40 miles / hour