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ElenaW [278]
3 years ago
14

Select the proper order from least to

Mathematics
2 answers:
julsineya [31]3 years ago
8 0

Answer:

4/2, 2/7, 1/2, 5/6 is your answer

grandymaker [24]3 years ago
6 0

Answer:

B) 2/7, 1/2, 5/6, 4/2

Step-by-step explanation:

LCM of 2,6,7,2 = 42

1/2 = (1/2) * (21/21) = 21/42

5/6 = (5/6) *  (7/7) = 35/42

2/7 = (2/7) * (6/6) = 12/42

4/2 = (4/2) * (21/21) = 84/42

<u>Ascending order: </u>

12/42, 21/42, 35/42, 84/42

2/7, 1/2, 5/6, 4/2

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Find the indicated probability. The weekly salaries of teachers in one state are normally distributed with a mean of $490 and a
Alecsey [184]

Given Information:

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Required Information:

P(X > $525) = ?

Answer:

P(X > $525) = 21.77%

Step-by-step explanation:

We want to find out the probability that a randomly selected teacher earns more than $525 a week.

P(X > 525) = 1 - P(X < 525)\\\\P(X > 525) = 1 - P(Z < \frac{x - \mu}{\sigma} )\\\\P(X > 525) = 1 - P(Z < \frac{525 - 490}{45} )\\\\P(X > 525) = 1 - P(Z < \frac{35}{45} )\\\\P(X > 525) = 1 - P(Z < 0.78)\\\\

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Therefore, there is 21.77% probability that a randomly selected teacher earns more than $525 a week.

How to use z-table?

Step 1:

In the z-table, find the two-digit number on the left side corresponding to your z-score. (e.g 0.7, 2.2, 1.5 etc.)

Step 2:

Then look up at the top of z-table to find the remaining decimal point in the range of 0.00 to 0.09. (e.g. if you are looking for 0.78 then go for 0.08 column)

Step 3:

Finally, find the corresponding probability from the z-table at the intersection of step 1 and step 2.

3 0
3 years ago
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