Answer:
50 miles
Explanation:
For Brittany
Brittany drove 320 miles in 4 hours.
4 hours = 320 miles
5 hours = x miles
Cross Multiply
4hours × x = 5 hours × 320 miles
x = 5 hours × 320 miles/4 hours
x = 400 miles
For Lauren
Lauren drove 280 miles in 4 hours.
4 hours = 280 miles
5 hours = x miles
Cross Multiply
4hours × x = 5 hours × 280 miles
x = 5 hours × 280 miles/4 hours
x = 350 miles
At these rates, the number of miles can Brittany drive in 5 hours than Lauren is calculated as:
Number of miles Brittany drives in 5 hours - Number of miles Lauren drives in 5 hours
= 400 miles - 350 miles
= 50 miles