1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Ilya [14]
3 years ago
7

Annie was told that her math test score was 3 standard deviations below the mean. If test scores were approximately normal with

μ=99 and σ=4, what was Annie's score? Do not include units in your answer. For example, if you found that the score was 99 points, you would enter 99.
Mathematics
1 answer:
Masteriza [31]3 years ago
7 0

Answer:

X \sim N(99,4)  

Where \mu=99 and \sigma=4

We want to find the Annie's score takign in count that the score is 3 deviations below the mean, so then we can find the value with this formula:

X = \mu -3\sigma

And replacing we got:

X = 99 -3*4 = 87

So then the Annie's score would be 87

Step-by-step explanation:

Let X the random variable that represent the test scores of a population, and for this case we know the distribution for X is given by:

X \sim N(99,4)  

Where \mu=99 and \sigma=4

We want to find the Annie's score takign in count that the score is 3 deviations below the mean, so then we can find the value with this formula:

X = \mu -3\sigma

And replacing we got:

X = 99 -3*4 = 87

So then the Annie's score would be 87

You might be interested in
Someone please help :)
larisa86 [58]
The answer is 6m djsjdjjsskskksksksksksksmsmsm
8 0
3 years ago
It is given that D is inversely proportional to v m
Darina [25.2K]

Answer:

Step-by-step explanation:

D=\frac{k}{\sqrt{m}}\\\\64=\frac{k}{\sqrt{9}}\\\\64=\frac{k}{3}\\\\ 64*3=k\\\\k=192\\a)D=\frac{192}{\sqrt{4}}\\\\=\frac{192}{2}\\\\D=96\\\\b)32=\frac{192}{\sqrt{m}}\\\\  32*\sqrt{m}=192\\\\\sqrt{m}=\frac{192}{32}=6\\\\m=36

8 0
3 years ago
Find the length of side a.<br> 10<br> A<br> 6<br> A. 4<br> B. 64<br> C. V 136<br> D. 8<br> PREVIOUS
dedylja [7]

Answer:

D .8

Step-by-step explanation:

hypotenuse (h) = 10

base (b) = 6

perpendicular (p) = a= ?

We know by using Pythagoras theorem we get

p = √ h² - b²

a = √ 10² - 6²

a = √ 64

a = 8

Hope it will help :)

8 0
2 years ago
An art exhibit is made by stacking three identical prisms on top of each other end-to-end so their smallest faces overlap. One o
cestrela7 [59]

The surface area of the exhibit is 1,638 cubic inches.

Step-by-step explanation:

Step 1:

If three prisms are out on top of each other we get a shape as follows;

The length of the base = 9 inches,

The width of the base =6 inches, and

The height of the exhibit = 3(17) = 51 inches.

To find the surface area of the total exhibit we consider there to be only one shape which the above dimension.

Step 2:

There are 6 faces to the exhibit.

The surface area of a rectangular prism is given by;

A=2(w l+h l+h w)

By substituting the values, we get

A=2((6)(9)+(51) (9)+(51) (6)) = 2 (819) = 1,638.

The surface area of the exhibit is 1,638 cubic inches.

4 0
3 years ago
57 divided by 8 with remainder.
zavuch27 [327]
If you would like to calculate 57 divided by 8, you can do this using the following steps:

57 divided by 8:
57 / 8 = 7 1/8 = 7.125

The correct result would be 7 1/8 or 7.125.
8 0
3 years ago
Other questions:
  • Helpmeh!!!!!!!?????!!!!!!!!!!!!!
    6·1 answer
  • What is the greatest common factor of 24 and 36
    12·2 answers
  • Help me please thank you
    10·1 answer
  • Can you please help me with this equation:<br> 3x-4y = 8 <br> 18x-5y=10
    12·1 answer
  • HELP PLEASEEEEeeeeeeeeeeww
    9·2 answers
  • The material used to make a storage box costs $1.25 per square foot. The boxes have the same volume, so how much does a company
    15·1 answer
  • Prove step by step that 5^20-5^19 is an even number with out using a calculator Please can you tell me the steps and why?
    12·1 answer
  • Evaluate: (9 - 3)2 + 5 = 1 3​
    9·1 answer
  • Can someone help me out my grads are bad
    10·2 answers
  • B is two-fifth of c
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!