3 years ago

Midpoint of a line segment that has endpoints at (-9,2),(-1,-5)

Mathematics

1 answer:

Alex Ar [27]3 years ago

6 0

Answer:

try Jiskha Homework Help

Step-by-step explanation:

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certain computer virus can damage any file with probability 35%, independently of other files. Suppose this virus enters a folde

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Answer:

0.623 is the probability that between 800 and 850 files get damaged.

Step-by-step explanation:

We are given the following information:

We treat virus can damage computer as a success.

P( virus can damage computer) = 35% = 0.35

The conditions for normal distribution are satisfied.

By normal approximation:

$\mu = np = 2400(0.35) = 840\\\sigma = \sqrt{np(1-p)} = \sqrt{2400(0.35)(1-0.35)} = $$23.36$

We have to evaluate probability that between 800 and 850 files get damaged.

$P(800 \leq x \leq 850) = P(\displaystyle\frac{800 - 840}{23.36} \leq z \leq \displaystyle\frac{850-840}{23.36}) = P(-1.712 \leq z \leq 0)\\\\= P(z \leq 0.428) - P(z < -1.712)\\= 0.666 - 0.043 = 0.623 = 62.3\%$

$P(800 \leq x \leq 850) = 62.3\%$

0.623 is the probability that between 800 and 850 files get damaged.

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3 years ago

At Jefferson middle school 82 students were asked which sport they plan to participate in for the upcoming year. 20 students pla

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Answer:

2 kids plan to do cross country

Step-by-step explanation:

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3 years ago

The weight of the books carried in a backpack depends on the number of books in the backpack. Susan’s books weigh from 1 pound t

vekshin1

Answer:

4 - 14 lbs

Step-by-step explanation:

Ok, so the most she can carry is 4 books. and they weigh 1 - 3.5 lbs. so you take 1 times 4. and thats well 4. then you do 3.5 times 4. thats 14 so your range would be 4 -14 lbs

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3 years ago

PLEASE HELP PLEASE! questions 9 through 16!

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(9.is 12 and 2)cghcjgcmhgcghccgckghc

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3 years ago

Three of nine softball players play outfield.what fraction of the players play outfield? Write the answer as a reduced fraction

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3/9 is the original fraction that play outfield
The reduced fraction is 1/3
3/9 = 1/3

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3 years ago