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3 years ago

PLEASE HELP EASY QUESTION

Mathematics

2 answers:

maxonik [38]3 years ago

7 0

2/3=0.6
is the answer

klemol [59]3 years ago

7 0

Answer:

This would be 2 over 3, decimal as 0.6.

Step-by-step explanation:

The amount that is shaded is 8 over 12, right? So that simplified is 2 over 3. 2 over 3 as a decimal would also be 0.6. Hope this helps. :)

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Pls do this and thanks for helping me out

Galina-37 [17]

Answer:

45, 5 45, 5. 5, 45, 5, 45, 5

Step-by-step explanation:

5 0

3 years ago

In order to be invited to tutoring or extension activities a students performance 20 point higher or lower than average for the

GalinKa [24]

Answer:

Step-by-step explanation:For the student to be considered for the tutoring or extension activities, his/her score must be 20 points lower or higher than the average.

The average is given as 105, that means:

Minimum score to be considered = 105 - 20 = 85

Maximum score to be considered = 105 + 20 = 125

If p represents the performance of a student, then this inequality will be represented as follows:

85 ≤ p ≤125

6 0

3 years ago

At NC State University, 16.4% of the undergraduate classes have more than 50 students. If a random sample of 200 undergraduate c

Lena [83]

Answer:

We need to check the conditions in order to use the normal approximation.

$np=200*0.164=32.8 \geq 10$

$n(1-p)=200*(1-0.164)=167.2 \geq 10$

$p \sim N(p,\sqrt{\frac{p(1-p)}{n}})$

The mean is given by:

$p =0.164$

And the deviation is given by:

$\sigma_{p}= \sqrt{\frac{0.164*(1-0.164)}{200}}= 0.0262$

So then the correct options for this case are:

The sampling distribution will be approximately normal.

The mean of the sampling distribution will be 16.4%.

The standard deviation of the sampling distribution will be 0.0262.

Step-by-step explanation:

Previous concepts

The binomial distribution is a "DISCRETE probability distribution that summarizes the probability that a value will take one of two independent values under a given set of parameters. The assumptions for the binomial distribution are that there is only one outcome for each trial, each trial has the same probability of success, and each trial is mutually exclusive, or independent of each other".

Let X the random variable of interest, on this case we now that:

$X \sim Binom(n=200, p=0.164)$

The probability mass function for the Binomial distribution is given as:

$P(X)=(nCx)(p)^x (1-p)^{n-x}$

Where (nCx) means combinatory and it's given by this formula:

$nCx=\frac{n!}{(n-x)! x!}$

We need to check the conditions in order to use the normal approximation.

$np=200*0.164=32.8 \geq 10$

$n(1-p)=200*(1-0.164)=167.2 \geq 10$

The population proportion have the following distribution

$p \sim N(p,\sqrt{\frac{p(1-p)}{n}})$

The mean is given by:

$p =0.164$

And the deviation is given by:

$\sigma_{p}= \sqrt{\frac{0.164*(1-0.164)}{200}}= 0.0262$

So then the correct options for this case are:

The sampling distribution will be approximately normal.

The mean of the sampling distribution will be 16.4%.

The standard deviation of the sampling distribution will be 0.0262.

6 0

3 years ago

How do you use a abacus in a simple way?

Allushta [10]

Each column is a digit, and the top two beads each represent 5 and the bottom 5 beads each represent 1. To read it, you add up the values of the "top" beads that are dropped down and the "bottom" beads that are raised up, and you read the number left to right.

7 0

3 years ago

Solve the system of linear equations by graphing.<br><br> y=2x−3<br> y=x+2

Musya8 [376]

Step-by-step explanation:

y=2x−3

y=x+2

y=-3

x=3/2

for the second line

y=2

x=-2

7 0

3 years ago