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amm1812
3 years ago
10

Jack has 5 craft sticks. He needs 4 times that number for a project.how many craft sticks does jack need altogether?

Mathematics
2 answers:
Katarina [22]3 years ago
8 0
Jack would have twenty craft sticks because four times that number is the same as x4 so you would do 5x4=20.
Blababa [14]3 years ago
5 0
Jack needs twenty craft sticks
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Step-by-step explanation:

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A machine fills containers with a particular product. Assume the filling weights are normally distributed with a variance of 0.1
Ghella [55]

Answer:

z=-0.674

And if we solve for \mu we got

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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".

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Solution to the problem

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P(X   (b)

Both conditions are equivalent on this case. We can use the z score again in order to find the value a.  

As we can see on the figure attached the z value that satisfy the condition with 0.25 of the area on the left and 0.85 of the area on the right it's z=-0.674. On this case P(Z<-0.674)=0.25 and P(z>-0.674)=0.85

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P(X  

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But we know which value of z satisfy the previous equation so then we can do this:

z=-0.674

And if we solve for \mu we got

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So then the mean is 'mu = 12.270 for this case.

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Hope this helps!
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