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Softa [21]
2 years ago
15

I need help with this pls help pls show how you got it also

Mathematics
1 answer:
kogti [31]2 years ago
4 0

The range is from -3 to ∞

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Jacob needs to know the volume of the cylinder shown below. Which expression will give him the correct volume?
Lilit [14]

Answer:

B

Step-by-step explanation:

3.14(24 square)(2.5)                        

PIE X radius squared X height

6 0
3 years ago
Read 2 more answers
Pls help!! And show work thank you
leva [86]

Answer:13 and 12

Step-by-step explanation: the pattern is add 2 then minus one. But then the 2 continues to 3 4 5 and so on. So u add 5 to 8 which gives 13 then minus 1 again to get 12

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2 years ago
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What is (-2) (3/47) mean? I’m very confused...
xz_007 [3.2K]
It means to multiply those numbers. The answer is the first one.

(Look at image)
8 0
3 years ago
An engineer is going to redesign an ejection seat for an airplane. The seat was designed for pilots weighing between 130 lb and
egoroff_w [7]

Answer:

a) P(140

P(0.036

P(0.036

b) P(140< \bar X

Step-by-step explanation:

Previous concepts

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".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".  

Part a

Let X the random variable that represent the weights of a population, and for this case we know the distribution for X is given by:

X \sim N(139,28.1)  

Where \mu=139 and \sigma=28.1

We are interested on this probability

P(140

And the best way to solve this problem is using the normal standard distribution and the z score given by:

z=\frac{x-\mu}{\sigma}

If we apply this formula to our probability we got this:

P(140

And we can find this probability like this:

P(0.036

And in order to find these probabilities we can find tables for the normal standard distribution, excel or a calculator.  

P(0.036

Part b

For this case we select a sample size of n =32. Since the distribution for X is normal then the distribution for the sample mean \bar X is given by:

\bar X \sim N(\mu=139, \frac{\sigma}{\sqrt{n}}=\frac{28.1}{\sqrt{32}}=4.97)

And the new z score would be:

Z=\frac{\bar X -\mu}{\sigma_{\bar x}}

P(140< \bar X

P(140< \bar X

5 0
3 years ago
What is the mass and charge of a<br> neutron and a proton? Where are<br> they found in an atom?
djyliett [7]

Answer:

Step-by-step explanation:

Neutron: has mass and no charge

Protons: has mass and a positive charge

7 0
3 years ago
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