Answer:
it's 360.
Step-by-step explanation:
138+72+60+90=360
You can use the distance equation.. d = rt
d = distance = 645
r = rate = 215 mph
t = time = ???? find the time
645 = 215t
645/215 = 215t / 215
3 = t
t = 3
It took 3 hours
Explanation is in the file
tinyurl.com/wpazsebu
