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3 years ago

HELLLLLLLLLLLLLLLLLLLLLP

Mathematics

1 answer:

kkurt [141]3 years ago

6 0

So 10/2 simplified is 5/1 which is on point 5. -9/2 is already simplified so in decimal form it is -4.5 which is -4 1/2, so you go down from 0 and mark it right where the BLUE dot is and the GREEN dot is 5/1. Hope this helps! :)

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Final exam scores are normally distributed with a mean of 74 and a standard deviation of 6. Approximately, what percentage of fi

notka56 [123]

Answer:

81.86%

Step-by-step explanation:

We have been given that final exam scores are normally distributed with a mean of 74 and a standard deviation of 6.

First of all we will find z-score using z-score formula.

$z=\frac{x-\mu}{\sigma}$

$z=\frac{68-74}{6}$

$z=\frac{-6}{6}=-1$

Now let us find z-score for 86.

$z=\frac{86-74}{6}$

$z=\frac{12}{6}=2$

Now we will find P(-1<Z) which is probability that a random score would be greater than 68. We will find P(2>Z) which is probability that a random score would be less than 86.

Using normal distribution table we will get,

$P(-1$

$P(2>Z)=.97725$

We will use formula $P(a$ to find the probability to find that a normal variable lies between two values.

Upon substituting our given values in above formula we will get,

$P(-1$

Upon converting 0.81859 to percentage we will get

$0.81859*100=81.859\approx 81.86$

Therefore, 81.86% of final exam score will be between 68 and 86.

3 0

3 years ago

?C and ?D are complementary angles. If m?C = 36º, what is m?D?

ki77a [65]

Step-by-step explanation:

mC=36

mC+mD=90

36+mD=90

mD=54

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3 years ago

20 trillion seconds equals how many years

DerKrebs [107]

The answer is 32,000 years. Wow!!

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2 years ago

Give an example of a repeating decimal where two digits repeat. Explain why your number is a rational number?

Assoli18 [71]

An example of a repeating decimal would be 6.78787878. a rational number is a number that can be represented a/b where a and b are integers and b isnt equal to 0, so a<span>ny decimal number that is repeating can be written in the form a/b with b not equal to zero so it is a rational number</span>

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3 years ago

ANSWER ASAP PLEASE!

zimovet [89]

Answer:

2:7

Step-by-step explanation:

4+10=14

The least common factor is 2.

4/2=2

14/2=7

5 0

2 years ago

Read 2 more answers