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scoray [572]
3 years ago
11

Help please!! I'm timed. ​

Mathematics
1 answer:
const2013 [10]3 years ago
6 0
Answer: 42

explanation : 90-48=41
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x=1

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The graph shows a proportional relationship between the number of kilometers traveled by a bicycle (y) and the number of minutes
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3.10 i think i saw in quiz i hope you do a great job and ace the test

Step-by-step explanation:

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Suppose that a jewelry store tracked the amount of emeralds they sold each week to more accurately estimate how many emeralds to
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The confidence interval for the mean is given by the following formula:

\bar X \pm t_{\alpha/2}\frac{s}{\sqrt{n}}   (1)

And for this case the 95% confidence interval is given by (2.13; 2.37)

We have a point of estimate for the sample mean with this formula:

\bar X = \frac{Upper+ Lower}{2}= \frac{3.37+2.13}{2}= 2.75

And for the margin of error we have the following estimation:

ME= \frac{Upper -Lower}{2}= \frac{3.37-2.13}{2}= 0.62

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".

\bar X represent the sample mean

\mu population mean (variable of interest)

s represent the sample standard deviation

n represent the sample size  

Solution to the problem

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

\bar X \pm t_{\alpha/2}\frac{s}{\sqrt{n}}   (1)

And for this case the 95% confidence interval is given by (2.13; 2.37)

We have a point of estimate for the sample mean with this formula:

\bar X = \frac{Upper+ Lower}{2}= \frac{3.37+2.13}{2}= 2.75

And for the margin of error we have the following estimation:

ME= \frac{Upper -Lower}{2}= \frac{3.37-2.13}{2}= 0.62

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3 years ago
Find the volume of the cylinder. Use 3.14 for T. Round to the nearest tenth.
AleksandrR [38]
It will be 5 cm and use 3.14 to multiply
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Help me with this pls
PtichkaEL [24]
Your answer is gonna be 98. multiply all of the numbers
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2 years ago
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