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coldgirl [10]
3 years ago
15

If a pool holds 22,000 gallons, how long will it take to fill the pool at a rate of 400 gallons per minute, rounded off to the n

earest minute?
Mathematics
2 answers:
nalin [4]3 years ago
8 0
400x=22,000

22,000/400=x

55=x Hopefully this is right, and hopefully this helps
Effectus [21]3 years ago
6 0

Answer:

A pool can fill 22,000 gallons in 55 minute.

Step-by-step explanation:

Given :  A pool holds 22,000 gallons and to fill the pool at a rate of 400 gallons per minute,

To find  :  how long will it take to fill the pool .

Solution : We have given that

A pool can fill 400 gallons = 1 minute.

A pool can fill 1 gallons = \frac{1}{400}

A pool can fill 22,000 gallons =  \frac{22000}{400}.

A pool can fill 22,000 gallons = 55 minute.

Therefore, A pool can fill 22,000 gallons in 55 minute.

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A study was conducted to determine whether magnets were effective in treating pain. The values represent measurements of pain us
amm1812

Answer:

Given:

Sham: n= 20,     x=0.44,   s=1.24,

Magnet:n= 20,  x =0.49,   s= 0.95

For Sham:

Sample size, n = 20

Sample mean = 0.44

Standard deviation = 1.24

For Magnet:

Sample size = 20

Sample mean = 0.49

Standard deviation = 0.95

The null and alternative hypotheses:

H0: s1²=s2²

H1: s1² ≠ s2²

a) To find the test statistics, use the formula:

\frac{s1^2}{s2^2}

\frac{1.24^2}{0.95^2} = \frac{1.5376}{0.9025} = 1.7037

Test statistics = 1.7037

b) P-value:

Sham: degrees of freedom = n - 1 = 20 - 1 = 19

Magnet: degrees of freedom = n - 1 = 20 - 1 = 19

The critical values:

[Za/2, df1, df2)], [(1 - Za/2), df1, df2]

f[0.05/2, 19, 19], f[(1 - 0.05/2), 19, 19]

f[0.025, 19, 19], f[0.975, 19, 19]

(2.526, 0.3958)

The rejection region:

Reject H0, if  F < 0.3958 or if F > 2.526

c) Conclusion:

Since the critical values of test statistic is between (0.3958 < 1.7037 < 2.526), we fail to reject null hypothesis H0.

There is insufficient evidence to to support the claim that those given a sham treatment have reductions that vary more than those treated with magnets

3 0
3 years ago
simplify the following polynomial expression. <img src="https://tex.z-dn.net/?f=%285x%5E%7B3%7D%20%2B4x%5E%7B2%7D%20%2B6x-3%29%2
FrozenT [24]
Here is the answer hope it helps

7 0
3 years ago
URGENT HELP What is the equation of the line that passes through the point (-7, -4) and has a
shepuryov [24]

The final equation is:

y=x+3

Further explanation:

The general form of equation of a line in slope-intercept form is:

y=mx+b

Here m is the slope

Given

m=1

(x,y) = (-7,-4)

Putting\ the\ value\ of\ slope\ in\ equation\\y=(1)(x)+b\\y=x+b

To find the value of b, we have to put the point in the equation

-4=-7+b\\-4+7=b\\b=3

The final equation is:

y=x+3

Keywords: Slope-intercept form, equation of line

Learn more about slope-intercept form at:

  • brainly.com/question/6594923
  • brainly.com/question/6698921

#LearnwithBrainly

7 0
3 years ago
I needdd helpp :)))))
NeTakaya
I can’t see the scenario on top so can’t rlly help u out sorry
3 0
2 years ago
104 km= m? metric conversions104 km= m? metric conversions Follow 8 answers 8 Report Abuse Are you sure you want to delete this
Mars2501 [29]
Hello there. 

<span>104 km= m? metric conversions 104 km= m?

104000


</span>
3 0
3 years ago
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