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2 years ago

there are 983 boys and 1059 girls in a school estimate the approximate number of students in the school

Mathematics

1 answer:

gizmo_the_mogwai [7]2 years ago

8 0

It depends on How Many of them have b or g friends

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What is the binomial

mina [271]

Answer:

Step-by-step explanation:

The coefficients of the expansion of (a + b)^2 are 1 2 1, which is the third row of Pascal's triangle.

For (a + b)^3 they are 1 3 3 1 which is in the 4th row, and so on

So those for the (a + b)^n are in the (n + 1)th row.

4 0

3 years ago

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consider the following scenario: Assume daily protein intake values in a population of athletes are known to have a standard dev

Kipish [7]

Answer:

The 95% confidence interval for the population mean daily protein intake is between 69.97g and 84.03g.

Step-by-step explanation:

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1-0.95}{2} = 0.025$

Now, we have to find z in the Ztable as such z has a pvalue of $1-\alpha$ .

So it is z with a pvalue of $1-0.025 = 0.975$ , so $z = 1.96$

Now, find M as such

$M = z*\frac{\sigma}{\sqrt{n}}$

In which $\sigma$ is the standard deviation of the population and n is the size of the sample.

$M = 1.96*\frac{58.6}{\sqrt{267}} = 7.03$

The lower end of the interval is the sample mean subtracted by M. So it is 77 - 7.03 = 69.97g.

The upper end of the interval is the sample mean added to M. So it is 77 + 7.03 = 84.03g.

The 95% confidence interval for the population mean daily protein intake is between 69.97g and 84.03g.

5 0

3 years ago

What are two expressions that are equivalent to 6(5j + 2 + j)?<br><br><br><br>

ziro4ka [17]

Answer:

1. 30j+12+6j

2. 36j+12

3. 6(6j+2)

Step-by-step explanation:

1. You just multiply so... 6x5j ... 6x2 ... 6xj

2. you multiply and then simplify so first you have 30j+12+6j, so you add like terms so... 30j+6j= 36j and then +12

3. you do what's in the parentheses first so 5j+j=6j so .... 6(6j+2)

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3 years ago

How much faster was Todd’s second trial then his first trial

meriva

Answer:

Todd second trail was 4 then his first trial was 8

3 0

3 years ago

In whole milk, 13 parts out of 400 are milk fat. In 2% milk, 1 part out of 50 is milk fat. Which type of milk has more milk fat

ale4655 [162]

Whole milk because 1 out 50 milk fat is equal to 9 out of 400 milk fat so whole milk has more.

4 0

3 years ago

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there are 983 boys and 1059 girls in a school estimate the approximate number of students in the school​

there are 983 boys and 1059 girls in a school estimate the approximate number of students in the school