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3 years ago

8

I GIVEEEE BRAINLILST

1 answer:

Nitella [24]3 years ago

7 0

Answer:

Step-by-step explanation:

A for sure

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The length of a box is 100 cm, the width is 20 cm, and the height is 0.5 m. Which expression represents the volume in mº?

artcher [175]

Answer:

This is the correct answer: 1 X 0.2 x 0.5

Step-by-step explanation:

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5 0

2 years ago

0.083+0.25+0.3+0.416+0.83+0.83

alukav5142 [94]

I’m pretty sure it’s 2.709

6 0

3 years ago

Which element makes up 1/400 of the human body ? Magnesium, Potassium, Sodium, or Sulfur

Flauer [41]

Magnesium makes up 1/400 of the human body

8 0

4 years ago

Read 2 more answers

What is 103.468 rounded to the nearest liter

kondaur [170]

So you have to round up if it is 5 or higher and dont if 4 or lower so the nerest is 104 liters

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3 years ago

Read 2 more answers

Set A of six numbers has a standard deviation of 3 and set B of four numbers has a standard deviation of 5. Both sets of numbers

Alenkinab [10]

Given:

$\sigma_A=3$

$n_A=6$

$\sigma_B=5$

$n_B=4$

$\overline{x}_A=\overline{x}_B$

To find:

The variance. of combined set.

Solution:

Formula for variance is

$\sigma^2=\dfrac{\sum (x_i-\overline{x})^2}{n}$ ...(i)

Using (i), we get

$\sigma_A^2=\dfrac{\sum (x_i-\overline{x}_A)^2}{n_A}$

$(3)^2=\dfrac{\sum (x_i-\overline{x}_A)^2}{6}$

$9=\dfrac{\sum (x_i-\overline{x}_A)^2}{6}$

$54=\sum (x_i-\overline{x}_A)^2$

Similarly,

$\sigma_B^2=\dfrac{\sum (x_i-\overline{x}_B)^2}{n_B}$

$(5)^2=\dfrac{\sum (x_i-\overline{x}_B)^2}{4}$

$25=\dfrac{\sum (x_i-\overline{x}_B)^2}{4}$

$100=\sum (x_i-\overline{x}_B)^2$

Now, after combining both sets, we get

$\sigma^2=\dfrac{\sum (x_i-\overline{x}_A)^2+\sum (x_i-\overline{x}_B)^2}{n_A+n_B}$

$\sigma^2=\dfrac{54+100}{6+4}$

$\sigma^2=\dfrac{154}{10}$

$\sigma^2=15.4$

Therefore, the variance of combined set is 15.4.

7 0

3 years ago