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Scilla [17]
3 years ago
15

LWhat is equivalent to 1/4

Mathematics
1 answer:
stira [4]3 years ago
5 0
Fractions equivalent to 1/4 are 2/8, 3/12, 4/16, 5/20
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33% depending on if your numbers is the same as mine

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When the british system of units was first developed, what was the most common object used as a basis for measuring length?
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How to make 3/20 a decimal
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The average life of a certain type of small motor is 10 years with a standard deviation of 2 years. The manufacturer replaces fr
Ivenika [448]

Answer:

She should offer a guarantee of 6.24 years.

Step-by-step explanation:

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore 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 pvalue, we get the probability that the value of the measure is greater than X.

In this problem, we have that:

\mu = 10, \sigma = 2

If she is willing to replace 3% of the motors that fail, how long a guarantee (in years) should she offer?

This is the value of X when Z has a pvalue of 0.03. So it is X when Z = -1.88. So

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

-1.88 = \frac{X - 10}{2}

X - 10 = -1.88*2

X = 6.24

She should offer a guarantee of 6.24 years.

8 0
2 years ago
Please help i am not passing my math class i will give you the brainliest I am struggling
mash [69]

Answer:

x=-6

Step-by-step explanation:

(8x-15)=(3x-45)

4 0
2 years ago
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