a) If someone drives an average of 23,000 mi per year, the number of gallons of gasoline will he save in a year by increasing his tire pressure from 30 to 35 psi is <u>83 gallons</u>.
b.) If gasoline costs $2.00 per gallon, the total savings in a year is <u>$166.00</u>.
c.) Given 140 million cars in a country that make these changes, the number of gallons of gasoline that would be saved with the increased tire pressure is <u>11,620 million gallons</u>.
<h3>How is the savings from increasing tire pressure calculated?</h3>
The savings from increasing the tire pressure from 30 pounds per square inch (psi) to 35 psi, can be calculated with these steps:
Step 1: Work out the number of gallons used at each psi by dividing the total miles by the miles per gallon.
Step 2: Subtract the total number of gallons used per 35 psi from that used per 30 psi.
<h3>Data and Calculations:</h3>
A):
Total distance per year = 23,000 mi
Initial tire pressure = 30 psi
Miles per gallon at 30 psi = 20.3 mpg
Increased tire pressure = 35 psi
Miles per gallon at 35 psi = 21.0 mpg
At 30 psi, the total gallons consumed = 1,133 gallons (23,000/20.3)
At 35 psi, the total gallons consumed = 1,050 gallons (23,000/21.9)
The total savings in gasoline = <u>83 gallons</u> (1,133 - 1,050).
B):
Cost of gasoline per gallon = $2.00
The total savings = <u>$166.00</u> (83 gallons x $2.00).
C):
The number of cars in the country = 140 million
Savings by one car = 83 gallons
Total savings of gasoline by the 140 million cars = <u>11,620 million gallons</u> (83 x 140 million).
Total dollar savings per car = $166
Total dollar savings by all cars in the country for the year = $23,240 million ($166 x 140 million)
Learn more about savings from increasing tire pressure at brainly.com/question/13186053 and brainly.com/question/12279096
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<h3>Question Completion:</h3>
a) If someone drives an average of 23,000 mi per year, how many gallons of gasoline will he save in a year by increasing his tire pressure from 30 to 35 psi?
b.) If gasoline costs $2.00 per gallon, how much will he save in a year?
c.) Assume that there are about 140 million cars in a country and that these changes are typical of each car, how many gallons of gasoline would be saved if all drivers increased their car's tire pressure?