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Margaret [11]
3 years ago
9

What is sales tax and how do you solve for it

Mathematics
1 answer:
s2008m [1.1K]3 years ago
8 0
Multiply the cost of an item or service by the sales tax in order to find out the total cost.<span>Make sure you put the sales tax into decimal form. You do this by taking the percentage and sliding the decimal point two places to the left: ...<span>Example: $60 (item cost) x .075 (sales tax) = $4.5 total sales tax.</span></span>
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The weekly salaries of sociologists in the United States are normally distributed and have a known population standard deviation
Lostsunrise [7]

Answer:

ME =z_{\alpha/2} \frac{\sigma}{\sqrt{n}}

The confidence level is 0.98 and the significance is \alpha=1-0.98 =0.02 and \alpha/2 =0.01 and the critical value using the table is:

z_{\alpha/2}= 2.326

And replacing we got:

ME=2.326 \frac{425}{\sqrt{22}}= 210.760\ approx 210.76

Step-by-step explanation:

For this case we have the following info given:

\sigma = 425 represent the population deviation

n =22 the sample size

\bar X =1520 represent the sample mean

We want to find the margin of error for the confidence interval for the population mean and we know that is given by:

ME =z_{\alpha/2} \frac{\sigma}{\sqrt{n}}

The confidence level is 0.98 and the significance is \alpha=1-0.98 =0.02 and \alpha/2 =0.01 and the critical value using the table is:

z_{\alpha/2}= 2.326

And replacing we got:

ME=2.326 \frac{425}{\sqrt{22}}= 210.760\ approx 210.76

3 0
3 years ago
Find the area of a semi circle with a diameter of 28cm
Alexandra [31]

since it has a diameter of 28, then its radius must be half that or 14.

\textit{area of a circle}\\\\ A=\pi r^2~~ \begin{cases} r=radius\\[-0.5em] \hrulefill\\ r=14 \end{cases}\implies A=\pi (14)^2\implies A=196\pi ~\hfill \stackrel{\stackrel{semi-circle}{half~that}}{98\pi }

8 0
2 years ago
b) if your friend wants to be as happy as possible, how many cheeseburgers should he eat? How do you know ? Answer question B
Svetllana [295]

Answer:

Find out what x should be the apply by the power of 2 then you should be good

7 0
3 years ago
Find the missing number. 30,______ 19, 13 1/2.
Andru [333]
The answer is 24.5 because 19-13 \frac{1}{2} = 5 \frac{1}{2} so you add 5.5 from 19 to get the answer
5 0
3 years ago
Mentally solve 18 × 25
koban [17]

Answer:

450

Step-by-step explanation:

Step 1:

18 × 25 = 450

Answer:

450

Hope This Helps :)

3 0
3 years ago
Read 2 more answers
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