Final answer:
Carmen's car consumed a total of 88,550 gallons of fuel on her round trip to the concert and back.
Step-by-step explanation:
Carmen's car consumed a different number of gallons on the drive to the concert and the drive back home.
On the drive to the concert, the fuel consumption rate was 125 gallons per mile, so to find out how many gallons of fuel Carmen's car consumed, we multiply the fuel consumption rate by the length of the route:
125 gallons/mile * 350 miles = 43,750 gallons
On the drive back home, the fuel consumption rate was 128 gallons per mile:
128 gallons/mile * 350 miles = 44,800 gallons
To find out how many gallons of fuel Carmen's car consumed altogether, we add the amount consumed on the drive to the concert and the drive back home:
43,750 gallons + 44,800 gallons = 88,550 gallons