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laiz [17]
3 years ago
10

How many hours are there in 1 month if there are 31 days in a month. Will mark brainliest.

Mathematics
2 answers:
Alona [7]3 years ago
4 0

Answer:

744

Step-by-step explanation:

<h3>in one day there is 24 hours if you multiply 24*31 it will be 744hours in total .</h3><h3 /><h3>24*31=744</h3><h3 /><h3>so you multiply the amount of time with the amount of days :)</h3><h3 /><h3>hope you get it !</h3><h3 /><h3>please mark me brilliant if im right</h3><h3 /><h3>thank you :3</h3>
Karo-lina-s [1.5K]3 years ago
3 0

Answer: 744 hours in a month

Step-by-step explanation:

31x24=744

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When a number is decreased by 3.5%, the result is 91 what is the original number to the nearest tenth
sdas [7]

Answer:

87.8

Step-by-step explanation:

So you have to multiply 91 times 3.5 which equals 318.5

                      91 × 3.5 = 318.5

Then divide 318.5 by 100 which equals 3.185

                      318.5 ÷ 100 = 3.185

Next subtract 91 by 3.185 which equals 87.815

                      91 - 3.185 = 87.815

Last Round 87.815 to 87.8

                       87.8 should be the answer

Hope this helps

4 0
3 years ago
Read 2 more answers
Cesar is coordinator planning the Home Run Derby. You want to select players who deserve to be
madam [21]

Answer:

Wait From What I See Aren't You Just Supposed To Put A Name And Date?

Step-by-step explanation:

3 0
3 years ago
What is the formula for a confidence interval?
ikadub [295]

Answer:

a) The formula is given by mean \pm the margin of error. Where the margin of error is the product between the critical value from the normal standard distribution at the confidence level selected and the standard deviation for the sample mean.

b) \bar X \pm z_{\alpha/2}\frac{\sigma}{\sqrt{n}}

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".  

If the distribution for X is normal or if the sample size is large enough we know that the distribution for the sample mean \bar X is given by:

\bar X \sim N(\mu, \frac{\sigma}{\sqrt{n}})

Part a

The formula is given by mean \pm the margin of error. Where the margin of error is the product between the critical value from the normal standard distribution at the confidence level selected and the standard deviation for the sample mean.

Part b

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

\bar X \pm z_{\alpha/2}\frac{\sigma}{\sqrt{n}}

5 0
3 years ago
Can someone help with the last question I by accidentally pressed true tho
alina1380 [7]

Answer:

The answer is True.

Step-by-step explanation:

-3x - 10 > -31

-3(5) - 10 > -31

-15 - 10 > -31

-25 > -31

True.

6 0
3 years ago
Read 2 more answers
ASAP PLZZZ HELP
lisabon 2012 [21]

Answer:

group one c d f h group two a g e b

Step-by-step explanation:

Hope this helps

5 0
3 years ago
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