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3 years ago

V=pie r^2(h/3) what formula could be used to find the height of the cone

Mathematics

1 answer:

kodGreya [7K]3 years ago

5 0

$v = \frac{1}{3} h{r}^{2} \pi$

$\frac{3v}{ {r}^{2} \pi} = h$

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Explain why the value of sine ratio for an acute angle of a right triangle must always be a positive value less than 1

weqwewe [10]

Answer: See below.

The sine ratio is the ratio of the opposite side over the hypotenuse in a right triangle. The hypotenuse is always the largest side of a triangle.

Therefore, the denominator will always be the largest. If the denominator is larger than the numerator, it will be a number less than one.

And it will be positive because it is an acute angle so the triangle when plotting in the unit circle would only be in the first quadrant. All values in the first quadrant are positive.

4 0

2 years ago

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Say a hacker has a list of n distinct password candidates, only one of which will successfully log her into a secure system. a.

alexdok [17]

Answer:

The probability is $\frac{1}{n}$

Step-by-step explanation:

If she has n distinct password candidates and only one of which will successfully log her into a secure system, the probability that her first first successful login will be on her k-th try is:

If k=1

$P = \frac{1}{n}$

Because, in her first try she has n possibles options and just one give her a successful login.

If k=2

$P=\frac{n-1}{n} *\frac{1}{n-1} =\frac{1}{n}$

Because, in her first try she has n possibles options and n-1 that are not correct, then, she has n-1 possibles options and 1 of that give her a successful login.

If k=3

$P=\frac{n-1}{n} *\frac{n-2}{n-1} *\frac{1}{n-2} = \frac{1}{n}$

Because, in her first try she has n possibles options and n-1 that are not correct, then, she has n-1 possibles options and n-2 that are not correct and after that, she has n-2 possibles options and 1 give her a successful login.

Finally, no matter what is the value of k, the probability that her first successful login will be (exactly) on her k-th try is 1/n

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2 years ago

Please help me ..<br>Use the distributive property to factor the expression.<br>2k + 10<br>

Aleksandr [31]

Answer:

2×(1+10)

Step-by-Step

You are just substituting in where the parenthesis go.

But I am not entirely sure.

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2 years ago

$45 CD player 6% tax Calculate the total including tax, tip or markup. pls show work

Yanka [14]

Answer:

the tax would be $2.70

Step-by-step explanation:

FIrst you would make the tax in decimal form then multiply the decimal with the cost, then you wil get the tax

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2 years ago

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I don’t get none of this work so help me please

kupik [55]

yeah. I can't see none of you work so help ME please.

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2 years ago