buy a calculator
2100 miles at 14 miles per gallon = 2100/14 = 150 gallons 150 gallons at 3.50 per gallon = 150*3.50 = 525.00
2100 miles at 21 miles per gallon = 2100/21 gallons = 100 gallons. 100 gallons at 3.80 per gallon = 100*3.80 = 380
$656.25 will be your fuel costs.
2100/70 = 30 hours
150 hours
1.46 days.
23.33333 hours
24.7058 hours
Time = Distance/Speed = 2100 miles / 85 mph = 24.71 hours.
21 hours.
32 hours 18.5 minutes.
2100 feet=0.397727273 miles