Question 357962
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Hi,
Note: Driver A will be driving 30mi aan Driver B will driving 20mi
d= r*t or t= d/r
Driver A
t = 30mi/50mph = 3/5 hr = 36/60 or 36 min.  Driver A should leave at 7:36 P.M.
Driver B 
t = 20mi/50mph = 2/5 hr = 24/60 or 24 min.  Driver B should leave at 7:24 P.M.