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3 years ago

I need answers to these questions would appreciate it

Mathematics

1 answer:

yanalaym [24]3 years ago

7 0

Answer:

the first one is 1.935843 x 10^6

the second one is 4 x 10^7

subtract the two numbers in each question

convert to scientific notation:

if the number is 40,000,000 the scientific notation would be 4 x 10^7 because there are 7 spaces behind the first digit, or the 4

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for the following data set calculate the percentage of data points that fall within one standard deviation of the mean, and comp

gayaneshka [121]

Answer:

First we need to find the mean and standard deviation of the given data.

The mean and standard deviation are given below:

$Mean=\frac{50+46+54+51+29+52+48+54+47+48}{10}=\frac{479}{10}=47.9$

$Standard-deviation=\sqrt{\frac{\sum(x-\bar{x})^2}{n-1} }$

$=\sqrt{\frac{(50-47.9)^2+(46-47.9)^2+(54-47.9)^2+...+(48-47.9)^2}{10-1} }$

$=7.20$

We have:

$\bar{x} \pm s=(47.9 \pm 7.20)$

$=(47.9-7.20, 47.9+7.20)$

$=(40.7, 55.1)$

Therefore, the percentage of values that lies within one standard deviation of the mean is:

$\frac{9}{10} \times 100 =90\%$

The expected percentage of values within one standard deviation of the mean according to normal distribution is 68%.

Therefore, the observed percentage of values within one standard deviation of the mean is much higher than the expected percentage of a normal distribution.

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3 years ago

1)According to the table, is the exam grade a function of the number of hours spent studying?

zloy xaker [14]

For #2, B is not a function because there are two outputs for 2. In order to be a function there must only be one output for every input.

I believe the answer to #1 is D for the same reason.

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3 years ago

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How many megabyte equals 32gigabyte

Harlamova29_29 [7]

Answer:

3200

Step-by-step explanation:

1000 Megabyte = 1 Gigabyte

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3 years ago

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the sum of three decimal numbers is 6 exactly one of the numbers is less than 1 what could the numbers be

Alekssandra [29.7K]

Answer:

{0, 2, 4}

Step-by-step explanation:

satisfies these criteria: 0 is less than 1, and 0+2+4 = 6.

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3 years ago

Find HCF and LCM<br><br> 100<br> 60

Flauer [41]

$100 = 2 \times 2 \times 5 \times 5 \\ 60 = 2 \times 2 \times 3 \times 5 \\ hcf = 2 \times 2 \times 5 = 20 \\ lcm = 2 \times 2 \times 5 \times 3 \times 5 = 300$

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2 years ago

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