Please help me pretty please I been stuck on this for a while now

Mathematics

1 answer:

Alecsey [184]2 years ago

5 0

D because both sides have a length of 5

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The width of a photograph is 4.5 in.less than the length. if the width is 9.2 in., what is the length

vredina [299]

Add 4.5 and 9.2 to get 13.7.

13.7

13.7 in. is the length

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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

Identify the real and imaginary parts of the complex number. -5 + 6i

Genrish500 [490]

-5 is the real part and 6i is the imaginary part. This can be determined by looking which number has the "i" attached to it.

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What is 6% of 1 trillion dollars written in expanded form?

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Im think the answer is: 60000000000

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