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garri49 [273]
3 years ago
11

SAT scores are normally distributed, with a mean of 500 points and a standard deviation of 100 points. Suppose you take the SAT.

Several weeks later, you receive your results, which show that you reached the 80th percentile for the math portion.
Recalling that SAT scores are always expressed as multiples of 10, how many points did you get on the test?
Mathematics
2 answers:
Bad White [126]3 years ago
7 0

Answer:

580

Step-by-step explanation:

Apex

OleMash [197]3 years ago
3 0
The solution to the problem is as follows:

 <span>Let be X: scores of SAT 

P(X ≥ x) = 0.9 

P((X - 500)/100 ≥ (x - 500)/100) = 0.9 

P(Z ≥ z) = 0.9 

z = 1.28 

1.28 = (x - 500)/100 

128 + 500 = x 

x = 628
</span>
I hope my answer has come to your help. God bless and have a nice day ahead!
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NeX [460]

Answer:

48

Step-by-step explanation:

y = 0

is basically the horizontal axis.

First, find the integral of x^2-25.

Remember that

integral of a constant is that constant times x.

Also that

to take the integral of a power function, add 1 to the degree and divide by that same degree.

y =  {x}^{2}  - 25

We then get

\frac{ {x}^{3} }{3}  - 25x

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\frac{ - 3 {}^{3} }{3}  - 25( - 3)

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Then we evaluate at 0

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Next, we subtract the the answer then we get

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8 0
2 years ago
Brian is selling cookies at a bake sale. He earns $2.75 for each bag of cookies he sells. Write an equation to represent this sc
sesenic [268]
Let C equal bags of cookies
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Probably not enough sorry if it isn't
5 0
3 years ago
Read 2 more answers
Please help asap! (:
MAXImum [283]
Hello!

You can only add variables with the same base and exponent

8u^3 + 4u^3 = 12u^3
8u^2 + 0 = 8u^2
0 + -6u = -6u
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Put the sums together

12u^3 + 8u^2 - 6u + 9

The answer is D) 12u^3 + 8u^2 - 6u + 9

Hope this helps!

6 0
3 years ago
Read 2 more answers
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