Answer:
Ace bike hourly rate is $3.5 per hour
Bart bike hourly rate is $3.0 per hour
It is lower by rate $0.5 per hour
Explanation:
Ace bike:
Ace bike rentals rents bikes for $28 per day
Rental price =$28
Renters can keep the bike for 8 hours
so, total time in a day =8 hours
now, we can find hourly rate
hourly rate = (Rental price)/( total time in a day)
now, we can plug values
hourly rate is

=$3.5 per hour
Bart bike:
Bart bike rentals rents bikes for $30 per day
Rental price =$30
Renters can keep the bike for 10 hours
so, total time in a day =10 hours
now, we can find hourly rate
hourly rate = (Rental price)/( total time in a day)
now, we can plug values
hourly rate is

=$3 per hour
so, changed hourly rate
=Ace hourly rate - Bart hourly rate
we can plug values


So, it is lower by rate $0.5 per hour