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3 years ago

Please help me out here! :D

Mathematics

1 answer:

zimovet [89]3 years ago

7 0

I see no reason for the aluminum foil to have lost any volume, matter, mass , etc.

If all pieces are retrieved for measuring. - &

If a clean cut was achieved- and the blade used to cut did not impede upon the proceedings by also being variable, then I reiterate that there should be no difference in volume, matter, mass, etc.

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A test consists of 100 multiple choice questions, each with five possible answers, only one of which is correct. Find the mean a

TEA [102]

Answer: Mean = 20 and standard deviation = 4

Step-by-step explanation:

Let x represents the success of getting the correct answer.

Here, the total number of trials(n) = 100

The probability of getting the correct answer, p = 1/5

Thus, the mean of the number of correct answer,

$\mu_x= np$

$\mu_x= 100\times 1/5$

$\mu_x= 20$

Now, the standard deviation, $\sigma_x= \sqrt{n\times p\times (1-p)}$

$\sigma_x= \sqrt{100\times 1/5\times 4/5}$

$\sigma_x= \sqrt{16}$

$\sigma_x= 4$

Thus, First option is correct.

6 0

4 years ago

Estimate the solution of the system<br> of equations.<br> use the photo i uploaded

Misha Larkins [42]

What he said for every four there is four

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3 years ago

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Angela uses 7 1/2 inches each of 6 different colors of embroidery floss to make one friendship bracelet. each package of floss c

brilliants [131]

She can make 41 bracelets

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3 years ago

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How can you use metal math to determine if a ratio is simplified

kap26 [50]

That's a simple question.

Ans: If both numbers can be divided to equal a whole number, then it can be simplified.
Example: 35:7 (this is your ratio) divided by 7 = 5:1

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3 years ago

A caircular fountian has a circumference of 21 feet. Which expression can be used to find the diameter of the fountian in feet?

KiRa [710]

Answer: $21 = 2\pi r$

Step-by-step explanation:

To find the circumference of a circle, you can use $2\pi r$ . You can set this equal to 21 (feet). The equation to solve at this point would be $21=2\pi r$ .

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3 years ago