Problema Solution
a bus traveled at an average rate of 50 miles per hour then reduced its average rate to 40 miles per hour. if the bus drove 4 hours how long did the bus drive at each rate
Answer provided by our tutors
depends on how far the bus drove... could have driven 3 hours at 50 mph and then 1 hour at 40 mph, etc.
an infinite number of possibilities without some limitation on how far the bus drove