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fredd [130]
2 years ago
14

For dinner, Abelita chooses the Italian salad that costs $3.99 before tax, and Franco chooses the fettuccini alfredo that costs

$7.17 before tax. If the sales tax is 5 percent, explain how to find the total cost for their dinner.
Mathematics
2 answers:
ivolga24 [154]2 years ago
7 0

Answer

Find out the total cost for their dinner.

To prove

As given

For dinner, Abelita chooses the Italian salad that costs $3.99 before tax.

Franco chooses the fettuccini alfredo that costs $7.17 before tax.

Total cost of the dinner before tax = $ 3.99 + $7.17

                                                         = $ 11.16

As given

If the sales tax is 5 percent .

5 % is written in the decimal form.

= \frac{5}{100}

= 0.05

5% tax on the dinner cost = 0.05 ×  11.16

                                          = $0.558

Total cost of the dinner = Total cost of the dinner before tax + tax cost

                                      = $11.16 + $0.558

                                     = $ 11.718

                                     = $11.72 (approx)

Therefore the total cost for their dinner is $ 11.72 (approx)

denis-greek [22]2 years ago
6 0

Answer:

Answer is down below

Step-by-step explanation:

The total cost of the dinner is found by adding the two prices together. Then this sum is multiplied by 1.05, which is 100% + 5%, to get a cost of $11.72.

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Answer:

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The Standard Deviation is a measure of how spread out numbers are. Its symbol is σ (the greek letter sigma)

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Step 2: Create the below table.

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\sum{\left(x_i - \overline{X}\right)^2} = 1472.4

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\sigma = \sqrt{ \frac{ \sum{\left(x_i - \overline{X}\right)^2 }}{n-1} }       = \sqrt{ \frac{ 1472.4 }{ 10 - 1} } \approx 12.7906

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