An employee at a marketing firm A student uses approximately 40 to 45 gallons of gasoline per month. The cost of gasoline varies between $2.96 and $3.61 per gallon. Which of the following is a reasonable estimate of the student's weekly gasoline expense?
A. $15
B.$30
c. $45
D. $50
a bit over ten gallons a week at about three dollars per gallon = $30
A student uses approximately 40 to 45 gallons of gasoline per month. The
15
To find a reasonable estimate of the student's weekly gasoline expense, we need to determine the average cost per gallon and then multiply it by the number of gallons used per week.
1. First, we find the average cost per gallon:
- The cost of gasoline varies between $2.96 and $3.61 per gallon.
- We can calculate the average by adding the minimum and maximum values and dividing by 2:
Average cost per gallon = ($2.96 + $3.61) / 2
= $3.285
2. Next, we calculate the number of gallons used per week:
- The student uses approximately 40 to 45 gallons of gasoline per month.
- Since there are approximately 4 weeks in a month, we can calculate the average gallons per week:
Average gallons per week = (40 + 45) / 4
= 42.5
3. Finally, we calculate the estimated weekly gasoline expenses by multiplying the average cost per gallon by the average gallons used per week:
Estimated weekly gasoline expense = Average cost per gallon * Average gallons per week
= $3.285 * 42.5
≈ $139.61
Given the options provided, none of them are close to $139.61. Therefore, none of the options are reasonable estimates for the student's weekly gasoline expense.