MATHEMATICS HIGH SCHOOL

Given a mean of 9 and a standard deviation of 2.8, what is the z-score of the value 11 rounded to the nearest tenth?–0.9

–0.7

0.9

0.7

Answers

Answer 1
Answer: The answer is 0.7. Since the formula of the z-score is the difference of the score (x) and the mean divided by the standard deviation (SD)...
 
z= [ (x-mean)/SD ] 

You simply substitute the values given.

z = (11-9)/2.8
z=2/2.8
z=0.714

Then round it to the nearest tenth...

z- = 0.7

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M ∪ N = ____.

{3, 4, 6, 7, 9}
{3, 4, 5, 6, 8, 9}
{2, 4, 6, 8}

Answers

{3, 4, 6, 7, 9}????????????/

Answer:34679

Step-by-step explanation:

What is the length of the third side of the window frame below?A. 10 inches
B. 12 units
C. 16 units
D. 20 units

Answers

Answer:

20 units

Step-by-step explanation:

a^(2)+b^(2)=c^(2)

48^(2)+b^(2)=52^(2)

2304+b^(2)=2704

2304-2304+b^(2)=2704-2304

b^(2)=400

\sqrt(b^(2))=\sqrt(400)

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therefore,20 is the length of the unknown side

-plz mark brainliest-i try hard to help u guys

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I suck at math please do this for me I’ll give you anything

Answers

Answer:

Step-by-step explanation:

20:

The surface area of a cube is 2.535 m2. Which statements are true about the same cube measured in square centimeters?


Choose all answers that are correct.


A.
The number representing the surface area would decrease.


B.The number representing the surface area would increase.


C.
The actual surface area would decrease.


D.
The actual surface area would increase.


E.
The actual surface area would stay the same.

Answers

Given:
Surface area of a cube = 2.535 m²

convert square meters to square centimeters:
1 square meter = 10,000 square centimeters

2.535 m² * 10,000 cm²/m² = 25,350 cm²


B.The number representing the surface area would increase.
(from 2.535 to 25,350)

E.The actual surface area would stay the same.
(only the units used differ).

Your friend deposits $8500 in an investment account that earns 2.8% annual interest. What is the balance after 8 years when the interest is compounded quarterly? 1

Answers

I believe the balance would be $10,601.42

Hopefully that is the right answer

Which function describes the graph in the picture? NEED HELP ASAP

Answers


-- The function is a sine or cosine that wiggles from 3 below to 3 above its average value.  So the amplitude is 3 .  That lets out the 1st and 3rd choices.
It has to be the 2nd or 4th choice.

Looking at the graph, the y-intercept is at  y=6.
The y-intercept is the point where x=0,  so f(0)=6.

Test the 2nd choice:    f(x)  =  3 cos(x)  +  3

                                 f(0)  =  3 cos(0)  +  3

cos(0) = 1   so           f(0)  =  3 (1)       +  3          = 6

Choice-2 is looking good. 
Just to be sure, let's check choice-4:

                                 f(x)  =  3 sin(x)  +  3

                                 f(0)  =  3 sin(0)  +  3

sin(0) = 0       so        f(0)  =  3 (0)       +  3      = 3

Beautiful !  Choice-4 flopped.  The answer is choice-2 .

Answer: b

Step-by-step explanation:
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