Question 916132
Assuming you're renting for one day, your cost is $30 to rent the car, leaving you $47 for mileage.  $47/.19 = 247 miles
If you rent the car for 2 days ($30*2=$60), then you have $27 to spend on mileage. $27/.19 = 142 miles
You cannot rent the car for three days, even if you park it. ($30*3=$90)