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tester [92]
3 years ago
14

The GRE is an entrance exam that most students are required to take upon entering graduate school. In 2014, the combined scores

for the Verbal and Quantitative sections were approximately normally distributed with a mean of 310 and a standard deviation of 12.
What percent of scores were between 286 and 322? Round your answer to the nearest whole number.
Mathematics
1 answer:
Ede4ka [16]3 years ago
8 0
\mathbb P(286
\mathbb P(286

The empirical rule says that approximately 68% of any normal distributed data set lies within one standard deviation of the mean.

\mathbb P(-2
\implies\mathbb P(-2

The same rule states that about 95% lies within two standard deviations of the mean. Using this rule, and the fact that any normal distribution is symmetric about its mean, you have

\mathbb P(-2
0.95=2\mathbb P(-2
\implies\mathbb P(-2

\implies\mathbb P(-2
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Rename the number 780000 = 78
AfilCa [17]
<span>We need to rename the given number which is 780 000 into 78 ________.
=> But before we rename it, we need to find the value of 78
=> Since this is a 6 digit whole number, we have ones, tens, hundreds, thousands, ten thousands, hundred thousands.
=> 7 = hundred thousands
=> 8 = ten thousands
=> 7 hundred thousands + 8 ten thousands
=> Thus, the renamed of 780 000 is 7 hundred 8 ten thousands.

</span>



3 0
3 years ago
The function f(x) is a quadratic function and a limited table of values is provided below. Write the equation of the quadratic p
OverLord2011 [107]

Answer:

  f(x) = 3x^2 -21x +36

Step-by-step explanation:

The table gives the x- and y-intercepts, which are sufficient to write the equation in factored form. The x-intercepts of 3 and 4 tell you that factors are (x -3)(x -4). When x=0, this product is (-3)(-4) = 12, but the y-intercept value is 3 times that: 36. So, the factored equation is ...

  f(x) = 3(x -3)(x -4)

Multiplying this out, we get ...

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  f(x) = 3x^2 -21x +36

4 0
3 years ago
What does prime mean?
dlinn [17]

Answer:

Prime numbers are whole numbers that are greater than 1 which only have factors of 1 and itself.

The area of the triangle is 1358 square feet

Step-by-step explanation:

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Area = 1/2 (56 * 48.5)

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8 0
2 years ago
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Simplify the expression. (x1/6 y1/9)3
harina [27]
Ok, first let's multiply:
3 x 1/6 = 3/6 (simplify:) 1/2

Then multiply again:
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Now the expression is simplified to (1/2x, 1/2y)

Hope this helped! Please comment or DM me if you have anymore questions or don't understand :)
8 0
3 years ago
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sergiy2304 [10]

Answer:

The correct answer is A and C.

5 0
2 years ago
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