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Verdich [7]
3 years ago
15

Need help anyone know the answer​

Mathematics
2 answers:
Zina [86]3 years ago
6 0
I think that the answer is 5 and 6
VladimirAG [237]3 years ago
5 0

Answer:

5 and 6

Step-by-step explanation:

5 and 6

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The jewelry store has a ring with a retail price of $372.50. It is on sale for 60% off the retail price, what is the discount an
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3 years ago
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A study of long-distance phone calls made from General Electric Corporate Headquarters in Fairfield, Connecticut, revealed the l
lesya692 [45]

Answer:

The probability that a call last between 4.2 and 4.9 minutes is 0.4599

Step-by-step explanation:

Let X be the length in minutes of a random phone call. X is a normal distribution with mean λ=4.2 and standard deviation σ=0.4. We want to know P(4.2 < X < 4.9). In order to make computations, we will use W, the standarization of X, given by the following formula

W = \frac{X-\mu}{\sigma} = \frac{X-4.2}{0.4}

We will use \phi , the cummulative distribution function of W. The values of \phi are well known and the can be found in the attached file

P(4.2 < X < 4.9) = P(\frac{4.2-4.2}{0.4} < \frac{X-4.2}{0.4} < \frac{4.9-4.2}{0.4}) = P(0 < W < 1.75) = \\ \phi(1.75) - \phi(0) = 0.9599-0.5 = 0.4599

We conclude that the probability that a call last between 4.2 and 4.9 minutes is 0.4599

Download pdf
7 0
3 years ago
An arithmetic sequence is defined by its 1st term a1 = 7 and the sum of the first 10 terms s10 = 25. Find the difference d of th
VARVARA [1.3K]

Step-by-step explanation:

difference is 1.8

hope it is correct

3 0
2 years ago
30 points!<br>please help<br><br>in return brainliest and special thanks
a_sh-v [17]
21. >

22. Distributive Property
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3 years ago
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