4 years ago

What is the amount of sales tax owed on a $39 jacket if the tax rate is 5%?

Mathematics

1 answer:

mash [69]4 years ago

8 0

Letter c is the answer

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A class survey in a large class for first-year college students asked, “About how many minutes do you study on a typical weeknig

Anika [276]

Answer: (110.22, 125.78)

Step-by-step explanation:

The confidence interval for the population mean is given by :-

$\mu\ \pm z_{\alpha/2}\times\dfrac{\sigma}{\sqrt{n}}$

Given : Sample size = 463

$\mu=118\text{ minutes}$

$\sigma=65\text{ minutes}$

Significance level : $\alpha=1-0.99=0.01$

Critical value : $z_{\alpha/2}=z_{0.005}=\pm2.576$

We assume that the population is normally distributed.

Now, the 90% confidence interval for the population mean will be :-

$118\ \pm\ 2.576\times\dfrac{65}{\sqrt{463}} \\\\\approx118\pm7.78=(118-7.78\ ,\ 118+7.78)=(110.22,\ 125.78)$

Hence, 99% confidence interval for the mean study time of all first-year students = (110.22, 125.78)

3 0

3 years ago

Help! I need a=? And r=?% if I don't get my grade up I can't star drivers ed

lubasha [3.4K]

Initial is 12
Percent 1.05(I think but you might have to convert it)
Y=12(1.05)(5)
Y=63

7 0

3 years ago

jordan is making a model of Mount Saint Helens for a science project. The height of the actual volcano is about 2,500 meters. Sh

Dahasolnce [82]

Answer: 10 centimeters

Step-by-step explanation:

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3 years ago

Question 1<br> 2 (4x - 1) + 6<br> Equivalent to what

WARRIOR [948]

Answer:

2 (4x - 1) + 6 = 8x + 4 = 4(2x+1)

Step-by-step explanation:

2 (4x - 1) + 6

= (2*4x + 2*-1) + 6

= 8x - 2 + 6

= 8x + 4

= 4/(2x+1)

8 0

2 years ago

Read 2 more answers

Write 19/41 in lowest forms

Verizon [17]

Answer:

19/41

Step-by-step explanation:

this fraction cannot be simplified since 19 is a prime number.

5 0

3 years ago