To calculate the total amount for Savannah's lunch and the tip, we follow these steps:
-
Calculate the sales tax:
- Sales tax rate: 6%
- Bill before tax: $19.05
- Sales tax = \( 19.05 \times 0.06 \)
\[ \text{Sales tax} = 19.05 \times 0.06 = 1.143 \]
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Calculate the total amount after tax:
- Total amount after tax = Bill + Sales tax
\[ \text{Total after tax} = 19.05 + 1.143 = 20.193 \]
-
Calculate the tip:
- Tip rate: 12%
- Tip = \( 20.193 \times 0.12 \)
\[ \text{Tip} = 20.193 \times 0.12 = 2.42316 \]
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Round the tip to the nearest cent:
- Rounding \( 2.42316 \) gives \( 2.42 \) when rounded to two decimal places.
Thus, the tip that Savannah left is \(\boxed{2.42}\).