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3 years ago

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A fitness center currently has 320 members. Monthly membership fees are $45. The manager of the fitness center has determined th

at each time the membership fees increase by $5, approximately 10 members leave and go to a different gym.

1 answer:

murzikaleks [220]3 years ago

3 0

Are we subtracting the total or ? What's the question. , If so that would be 310 members as of the $5 raise in fees

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LOTS OF POINTS!! A cyclist rides a 25 mile stretch of road at a constant speed. It takes her 90 minutes to ride the 25 miles . A

sattari [20]

25m/90minutes = .278 mile/minute

Divide 25/90 to get .278

Hope that helps

7 0

3 years ago

You find the following financial information about a company: net working capital = $735; fixed assets = $5,385; total assets =

ddd [48]

Answer:

Company's total liabilities are $6,351.

Step-by-step explanation:

A company's financial information is given, we have to calculate the company's total liabilities.

Total assets = Fixed assets + current assets

Current assets = Total assets - Fixed assets

= $8,190 - $5,385

= $2,805

Networking capital = Current assets - Current liabilities

$735 = $2,805 - current liabilities

Current liabilities = $2,805 - $735

Current liabilities = $2,070

Total liabilities = Long term debt + current liabilities

= $4,281 + $2,070

= $6,351

Company's total liabilities are $6,351.

5 0

3 years ago

PLZS HELP NEED BY TODAY!!

Alex73 [517]

X=20. Because that line is 180 and u subtract 40 and u do 140/7= 20

3 0

3 years ago

Read 2 more answers

Which of the following equations could be used to find the value of 3,550 ÷ 25?

fiasKO [112]

Answer:

<em>A is correct answer</em>

Step-by-step explanation:

$(3000 + 500 + 50) \div 25 \\$

$(3550) \div 25$

$= = > 3550 \div 25$

Thanks

Don't forget to tell the name of your country.

8 0

2 years ago

A study was conducted to measure the effectiveness of hypnotism in reducing pain. The measurements are centimeters on a pain sca

saul85 [17]

Answer:

The 95% confidence interval for the difference would be given by (-1.776;0.376)

We are 95% confidence that the true mean difference is between $-1.776 \leq \mu_d \leq 0.376$ . Since the confidence interval contains the value 0, we don't have enough evidence to conclude that hypnotism appear to be effective in reducing pain.

Step-by-step explanation:

Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

Let put some notation

x=test value before , y = test value after

x: 6.4 2.6 7.7 10.5 11.7 5.8 4.3 2.8

y: 6.7 2.4 7.4 8.1 8.6 6.4 3.9 2.7

The differences defined as $d_i = y_i -x_i$ and we got:

d: 0.3, -0.2, -0.3, -2.4, -3.1, 0.6, -0.4, -0.1

We can calculate the mean and the deviation for the sample with the following formulas:

$\bar d=\frac{\sum_{i=1}^n d_i}{n}$

$s_d =\frac{\sum_{i=1}^n (d_i -\bar d)^2}{n-1}$

$\bar d=-0.7$ represent the sample mean for the difference

$\mu_d$ population mean (variable of interest)

$s_d$ =1.32 represent the sample standard deviation

n=8 represent the sample size

Confidence interval

The confidence interval for the mean is given by the following formula:

$\bar d \pm t_{\alpha/2} *\frac{s_d}{\sqrt{n}}$ (1)

In order to calculate the critical value t we need to find first the degrees of freedom, given by:

$df=n-1=8-1=7$

Since the Confidence is 0.95 or 95%, the value of alpha=0.05 and \alpha/2 =0.025, and we can use excel, a calculator or a table to find the critical value. The excel command would be: "=-T.INV(0.025,8)".And we see that $t_(\alpha/2)=2.306$

Now we have everything in order to replace into formula (1):

$-0.7-2.306\frac{1.32}{\sqrt{8}}=-1.776$

$-0.7+2.306\frac{1.32}{\sqrt{8}}=0.376$

So on this case the 95% confidence interval for the difference would be given by (-1.776;0.376)

We are 95% confidence that the true mean difference is between $-1.776 \leq \mu_d \leq 0.376$ . Since the confidence interval contains the value 0, we don't have enough evidence to conclude that hypnotism appear to be effective in reducing pain.

6 0

3 years ago