To find out how much Rob paid for the gas, you need to multiply the cost per gallon by the number of gallons purchased.
The cost per gallon is $2.16 and the number of gallons is 13.5.
Perform the multiplication:
\[ 2.16 \times 13.5 \]
First, let's break it down:
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Multiply without the decimal: \[ 216 \times 135 \]
Calculate \( 216 \times 135 \):
\[ 216 \times 135 = 29160 \]
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Count the decimal places:
- \(2.16\) has 2 decimal places.
- \(13.5\) has 1 decimal place.
- In total, we have \(2 + 1 = 3\) decimal places.
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Insert the decimal point: \(29160\) becomes \(29.160\) when you move the decimal point 3 places to the left.
So, the total amount Rob paid for the gas is:
\[ \text{Total cost} = 29.16 \]
Thus, Rob paid $29.16 for 13.5 gallons of gas.
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