What unit rate is 420 miles in 7 hours?
2 answers:
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Answer:
7.5 hours
Step-by-step explanation:
distance = rate * time (d=rt)
First we find her average rate, or speed:
- 140 miles = 3 hours * r
- r =
= 46.6666 miles/hour
Now we take that rate and use our second distance to find the time:
d = rt
t = d/r = 350 miles / 46.6666 miles/hour = 7.5 hours