2 years ago

What is the imaginary part of the following complex number -31?

Mathematics

1 answer:

Alex787 [66]2 years ago

4 0

Answer:

Step-by-step explanation:

-31 + 0i

Imaginary part = 0

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Given P(A)=0.78P(A)=0.78, P(B)=0.65P(B)=0.65 and P(A\cup B)=0.873P(A∪B)=0.873, find the value of P(A\cap B)P(A∩B), rounding to t

Sever21 [200]

Answer:

$P(A\ n\ B) = 0.557$

Step-by-step explanation:

Given

$P(A) = 0.78$

$P(B) = 0.65$

$P(A\ u\ B) = 0.873$

Required

Determine $P(A\ n\ B)$

From laws of probability, we have:

$P(A\ n\ B) = P(A) + P(B) - P(A\ u\ B)$

Substitute in values

$P(A\ n\ B) = 0.78 + 0.65 - 0.873$

$P(A\ n\ B) = 0.557$

Hence, $P(A\ n\ B)$ <em> is calculated to be 0.557</em>

8 0

2 years ago

How do you work out a percentile rank of a score of 57

arlik [135]

To do that you'll need the mean and standard deviation of all the scores. Can you provide this info?

For example: Supposing that the mean of these scores were 52 and the standard deviation 3. You'd need to find the "z-score" of 57 in this case.
57 - 52
It is z = ------------ , or z = 5/3, or z = 1.67.
3

Find the area to the left of z = 1.67. Multiply that area by 100% to find the percentile rank of the score 57.

8 0

3 years ago

Please help me out with this question ❤️ thank youu

stepan [7]

Answer:

5^6=15625

Step-by-step explanation: the little thing on the right of log to the power of the left of = is equal to the big numbers right of log

6 0

2 years ago

Gerald answered 28 math questions in 32 minutes. Tomas answered 27 questions in 30 minutes.Daniel answered 35 questions in 40 mi

gregori [183]

Daniel did. Happy Halloween can u mark me as brainliest and thanks. I neeed to rank up