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nalin [4]
3 years ago
11

The number of hours per week that high school seniors spend on computers is normally distributed, with a mean of 5 hours and a s

tandard deviation of 2 hours. 70 students are chosen at random. let y represent the mean number of hours spent on the computer for this group. find the probability that y is between 5.1 and 5.7
Mathematics
1 answer:
deff fn [24]3 years ago
8 0
5.4 dawg
if i did it the way i think it asks 
hope it helps!!
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Which equation can be used to find A, the area of the parallelogram shown?
aniked [119]
<h3>Answer: A = 6 x 7  </h3>

Explanation:

The area of a parallelogram is equal to base times height.

The base and height are always perpendicular to one another. Usually the base is horizontal along the ground (if not then you'd need to rotate your paper until it is, but that step is optional).

The base is 6 meters and the height is 7 meters.

Therefore, area = base x height = 6 x 7

The side of 11 meters is not used at all. It's likely put in there as a distraction.

3 0
2 years ago
Read 2 more answers
Evaluate u + xy, for u = 20, x = 5, and y = 7.
Yanka [14]

Answer:

55

Step-by-step explanation:

u + xy, for u = 20, x = 5, and y = 7

u + xy = 20 + 5 * 7 = 20 + 35 = 55

6 0
3 years ago
Read 2 more answers
Which expression below has the LEAST value?
Alexandra [31]

Answer: A

Step-by-step explanation:
Your answer is A.

Value of 3.78 x 10=37.8

Value of 5.99 x 102=699.98

value of 7.35 x 10-12=61.5

Value of 9.46 x 10-10=84.6.

Least value to greatest value

3.78 x 10=37.8 Least value

7.35 x 10 - 12=61.5 Sencond least value

9.46 x 10 - 10=84.6  Sencond greatest value

5.99 x 102=699.98  Greatest value

Hope it helps have a great day:)

7 0
2 years ago
Last one 15 points!!!!!
Soloha48 [4]

Answer:

5 Days

Step-by-step explanation:

<u>Step 1:  Make an expression</u>

150 - 7.50x = 112.50

<u>Step 2:  Solve the expression for x</u>

150 - 7.50x = 112.50

150 - 7.50x - 150 = 112.50 - 150

-7.50x / -7.5 = -37.5 / -7.5

x = 5

Answer:  5 Days

3 0
3 years ago
Read 2 more answers
he Wall Street Journal Corporate Perceptions Study 2011 surveyed readers and asked how each rated the Quality of Management and
sergejj [24]

Answer:

Following are the solution to the given question:

Step-by-step explanation:

H_0: Management quality and corporate reputation are independent.  

H_1:  Management quality and corporate reputation are not independent.

Test statistic:

\to \chi^2 = \frac{\sum (O-E)^2}{E}

= 0.71429 + 0.0102 +2.8809+0.625+1.75 +0.3333    +0+3.2143+7.5\\\\= 17.02806

The critical \chi^2 fordf = (r-1)(c-1) = (3-1)(3-1)= 4 and \alpha = 0.05 is \chi^2= 9.4877

Test statistic:

17.02806 > 9.4877 therefore rejecting the null hypothesis H_0.

p-value= 0.001909

Interpretation:

There is no internal governance quality as well as the reputation of the organization.

3 0
3 years ago
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