Answer:
One dog= 2 hours
Two dogs= 2 hours
One or Two cats= 2 hours
You would only be able to purchase 2 hours before it would be cheaper to pay for one day
Explanation:
One dog: the hourly rate is $7
7x2 = $14 but 7x3 = $21
The daily rate is $20 so it would be cheaper to pay for the day after 2 hours.
Two dogs: the hourly rate is $9
9x2= $18 but 9x3= $27
With the daily rate being only $25, paying for anymore than 2 hours would be more expensive than paying for the day.
One or Two cats: the hourly rate is $6
6x2= $12 but 6x3=$18
Again, $18 is more than the daily rate of $15
You can purchase 2 hours before it would be cheaper to pay for one day.