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Dovator [93]
3 years ago
13

What is the simplify ratio 40:28

Mathematics
1 answer:
Simora [160]3 years ago
3 0
40:28  = 10:7 simplified 
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College freshmen took a psychology exam. If the mean is 80, the SD is 10, and the scores have normal distribution, what percent
gayaneshka [121]

Answer:

  (a)  2%

Step-by-step explanation:

A score of 60 is 2 standard deviations below the mean (80 -2·10 = 60). The empirical rule tells you that 95% of the distribution is within 2 standard deviations of the mean. The remaining 5% is split evenly between those that are more than 2 SD above the mean and those that are more than 2 SD below the mean.

That tells you the percentage who failed is about 2.5%. The best answer choice is 2%.

_____

<em>Additional comment</em>

The empirical rule is a little bit sloppy, but it gets you in the ballpark. The actual percentage is closer to 2.275%.

6 0
3 years ago
4 1/3 ÷ 5 1/6 the respricol of a fraction must be found to solve the problem .what is reciprocal fraction that should be used ?
emmasim [6.3K]

The denominator would be 6.


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3 years ago
What is 4 divided by 631
vagabundo [1.1K]
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3 years ago
4a-3(a-2)=2(3a-2) How do you do this?
Alexxandr [17]

Answer:

a=2

Step-by-step explanation:

4a-3(a-2)=2(3a-2)

4a-3a+6=a-4

a+6=6a-4

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divide both sides by -5

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7 0
3 years ago
If p: All birds fly. What is ~ p?
Vika [28.1K]
C. not all birds fly.
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Not all birds can fly is going against All birds can fly.

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