3 years ago

Question 17, 19 and 21 ?

Mathematics

1 answer:

Vaselesa [24]3 years ago

3 0

If this is Textbook work- use SLADER (the app or the website)

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A binomial probability has p=.20 and n=100, what are the mean and standard deviation?

pychu [463]

Mean: $np=100\times0.20=20$

Standard deviation: $\sqrt{np(1-p)}=\sqrt{100\times0.20\times0.80}=4$

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2 years ago

The window of a burning building is 24 meters above the ground. the base of a ladder is placed 10 meters from the building. How

Orlov [11]

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3 years ago

When Belinda asked him to what pages his book was opened, he replied that the product of the facing pages was 87,912. To what pa

Liono4ka [1.6K]

Answer:

His book was opened at Page no.296 and Page no.297

Step-by-step explanation:

Let the page number of one page be x

Page number of page facing page no. x = x+1

We are given that the product of the facing pages was 87,912.

So, x(x+1)=87912

$x^2+x=87912$

$x^2+x-87912=0$

$x^2-296x+297x-87912=0$

$x(x-296)+297(x-296)=0$

(x+297)(x-296)=0

x=296,-297

Since Page no. cannot be negative

So, x=296

x+1=296+1=297

So, his book was opened at Page no.296 and Page no.297

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Jan received -22 points on her exam. She got 11 questions wrong out of 50 questions. How much was Jan penalized for each wrong a

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2 points for each incorrect answer.

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DedPeter [7]

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Step-by-step explanation:

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