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Ghella [55]
2 years ago
11

Justine bought a pair of boots for $76.68 and paid 13% sales tax. What was the price of these boots including tax?

Mathematics
1 answer:
MArishka [77]2 years ago
4 0

Answer: $86.65

Step-by-step explanation:

First, find how much Justine paid in tax. To do this, first convert 13% to a decimal by dividing by 100. This gets a tax rate of 0.13. Now, multiply the price of the boots by the tax rate. 76.68*0.13 = 9.9684. Round to the nearest cent to get $9.97.

Now, add the amount paid in tax to the price of the boots. 76.68+9.97 = $86.65.

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Find a_{1} by plugging in 1 into n:
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Now to find the sum your formula is:
S_{n} = \frac{n}{2} ( a_{1} + a_{n})
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