2 years ago

Can -20 and 20 be expressed with a less than or equal to sign? Example: -20 _< 20.

Mathematics

1 answer:

frosja888 [35]2 years ago

4 0

Less than. -20 is not the same as positive 20

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A student answers a multiple-choice examination question that offers four possible answers. Suppose the probability that the stu

Nitella [24]

Answer: 0.9730

Step-by-step explanation:

Let A be the event of the answer being correct and B be the event of the knew the answer.

Given: $P(A)=0.9$

$P(A^c)=0.1$

$P(B|A^{C})=0.25$

If it is given that the answer is correct , then the probability that he guess the answer $P(B|A)= 1$

By Bayes theorem , we have

$P(A|B)=\dfrac{P(B|A)P(A)}{P(B|A)P(A)+P(C|A^c)P(A^c)}$

$=\dfrac{(1)(0.9)}{(1))(0.9)+(0.25)(0.1)}\\\\=0.972972972973\approx0.9730$

Hence, the student correctly answers a question, the probability that the student really knew the correct answer is 0.9730.

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2 years ago

If Sin X equals .52" and cos X equals .85 what is cot X

Maslowich

Cot x = cos x / sin x = 0.85 / 0.52 = 1.6346

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3 years ago

6(-3-7)=? Please help!

katovenus [111]

Answer:

-60

Step-by-step explanation:

Distribute

6 x -3 = -18

6 x -7 = -42

-18 - 42 = -60

If my answer is right, please give it the brainliest.

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2 years ago

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Orlov [11]

And that’s what you do

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2 years ago

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I increase a number by 24% the answer is 6014 what number did I start with

miskamm [114]

Answer:

1443.36

Step-by-step explanation:

6014*.24=1443.36

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2 years ago