Sure, I would be glad to help you with that!
Here's a step-by-step guide:
1. Assume you drive an average of 15 miles each day. There are 7 days in a week, so to calculate the total distance you drive in one week, we have to multiply the daily mileage by the number of days in a week. So, 15 miles/day * 7 days/week = 105 miles/week.
2. Now, given that your car gets an average of 25 miles per gallon, you need to calculate the total number of gallons consumed in a week. You do this by dividing your weekly mileage by the average miles your car gets per gallon. So, 105 miles/week divided by 25 miles/gallon gives you 4.2 gallons/week.
3. Finally, we want to find out the total energy consumed in a week. We know that one gallon of gasoline contains about 31,500 kilocalories of energy. To get the total weekly energy usage, we multiply the number of gallons used in a week by the energy content per gallon. So, 4.2 gallons/week * 31,500 kcal/gallon equals 132,300 kcal/week.
So, if you drive an average of 15 miles per day, your car would use 105 miles, 4.2 gallons of gas, and 132,300 kcal of energy in a week.