A driver drove 90 miles and used 4 gallons of gasoline. What is the vehicle’s consumption rate in miles per gallon?
To find the vehicle's consumption rate in miles per gallon, we divide the total miles driven by the total gallons used:
Consumption rate = 90 miles / 4 gallons = <<90/4=22.5>>22.5 miles per gallon.
Therefore, the vehicle's consumption rate is 22.5 miles per gallon.