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tatyana61 [14]
3 years ago
14

I need help somebody please help me with my homework. and how you get the answer and explain me thanks

Mathematics
1 answer:
Zanzabum3 years ago
3 0
I <em />cant see what the numbers are but to find a cube, you do the number times itself 3 times example: 3 x 3 x 3 = 27. For cubing you do the number times itself twice for example 3 x 3 = 9. 

I can see the square root though. 
G: 36 = 6  64 = 8  81 = 9  25 = 5  324 = 18  529 = 23

The rest you should be able to understand with the explaining. Square root is finding what multiplied by itself is that number. Cube root is what times itself 3 times is that number. Hope this helps.  

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Manufacture of a certain component requires three different machining operations. Machining time for each operation has a normal
tigry1 [53]

Answer:

0.0314 = 3.14% probability that it takes at most 1 hour of machining time to produce a randomly selected component

Step-by-step explanation:

Normal Probability Distribution:

Problems of normal distributions can be solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the z-score of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the p-value, we get the probability that the value of the measure is greater than X.

Sum of normal variables:

When normal variables are added, the mean is the sum of the means while the standard deviation is the square root of the sum of the variances.

The mean values are 20, 15, and 30 min, respectively:

This means that \mu = 20 + 15 + 30 = 65

The standard deviations are 1, 2, and 1.5 min, respectively.

This means that \sigma = \sqrt{1^2 + 2^2 + 1.5^2} = 2.6926

What is the probability that it takes at most 1 hour of machining time to produce a randomly selected component?

Mean and standard deviation are in minutes, so this is the pvalue of Z when X = 60.

Z = \frac{X - \mu}{\sigma}

Z = \frac{60 - 65}{2.6926}

Z = -1.86

Z = -1.86 has a pvalue of 0.0314

0.0314 = 3.14% probability that it takes at most 1 hour of machining time to produce a randomly selected component

7 0
2 years ago
Can someone answer for me please, if you're great at math.
jonny [76]
Assuming that c is the length of AB (as is usually the case in the angle-side notation for triangles):
If sin(35) = 12/c, we can transform by multiplying both sides by c, and dividing both by sin(35) to get
c = 12/sin(35)
Evaluating using a calculator gives 20.92 units.
3 0
3 years ago
Convert 35 inches to yards. Explain or show how you got your answer.
Gwar [14]

Answer:

0.972222 yards

Step-by-step explanation:

35/36= 0.972222

7 0
3 years ago
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