Answer:
$5.07
Step-by-step explanation:
The amount of tax was ...
7% × $4.06 ≈ $0.28
The amount of tip was ...
18% × $4.06 ≈ $0.73
The total bill, with tax and tip, was ...
$4.06 +$0.28 +$0.73 = $5.07
Brendan paid $5.07 in total.
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Additional comment
The tax and tip are figured on the same base amount, so their percentages could be added. When you do that, you compute the total to be ...
$4.06 × (1 +7% +18%) = $4.06×1.25 = $5.075
Ordinarily, this would be rounded up to $5.08. However, the 7% tax and the 18% tip are both rounded down to the nearest cent, so the end result is $5.07, not $5.08.
