Question

Gasoline costs $3.65 a gallon. Which is an estimated cost of 14.2 gallons of gasoline?
$18
$30
$40
$56

Answer 1

To estimate the cost of 14.2 gallons of gasoline at $3.65 per gallon, we can multiply the price per gallon by the number of gallons:

\[
\text{Cost} = \text{Price per gallon} \times \text{Number of gallons}
\]
\[
\text{Cost} = 3.65 \times 14.2
\]

To estimate quickly, you can round $3.65 to $3.70 and then multiply:

\[
3.70 \times 14.2 \approx 3.7 \times 14 = 51.8
\]

Since $3.65 is closer to $3.70, the total cost will be just slightly less than $51.8.

Now, let's calculate the exact cost for accuracy:

\[
3.65 \times 14.2 = 51.83
\]

When looking at the options provided:

- $18
- $30
- $40
- $56

The approximate cost ($51.83) is closest to $56.

Thus, the estimated cost of 14.2 gallons of gasoline is **$56**.