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alekssr [168]
3 years ago
14

Pls explain your answer

Mathematics
1 answer:
spayn [35]3 years ago
8 0

Yo sup??

this is of the form called slope and point... hence

y-11=-4(x+2)

therefore the correct answer is option A

Hope this helps

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A- 30°<br> B- 17°<br> C- 73°<br> D- 100°
Verizon [17]

Answer:

B-17

Step-by-step explanation:

a right angle is 90° so if part of the angle is 73 we subtract 90-73 which equals 17

5 0
3 years ago
milk is 2.89 a gallon. if each geralds four children drinks 0.5 gallons of milk per week how much does he spend each week on mil
Aleks04 [339]

Amount of milk drunken:  (4 children)(0.5 gall per week per child)

Multiply the result of the above calculation by ($2.89 / gallon):

4(0.5)($2.89) = $5.78 per week milk expenditure


3 0
3 years ago
If the ratio of dogs to cats at an animal shelter is 2:5, then the number of cats is _____ times the number of dogs. CHECK
weeeeeb [17]
The number of cats is 2.5 times the number of dogs.
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the length of a rectangular piece of steel in a bridge is 5 meters less than double the width. the perimeter of the piece of ste
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3 years ago
Suppose that the probability that a person is killed by lightning, in a year is, independently of other people, 1/(500 million).
Katen [24]

Answer:

a) P(X \geq 3) = 1- P(X

The individual pprobabilities are:

P(X=0)=(300000000C0)(\frac{1}{500000000})^3 (1-\frac{1}{500000000})^{300000000-0}=0.548812

P(X=1)=(300000000C0)(\frac{1}{500000000})^3 (1-\frac{1}{500000000})^{300000000-0}=0.329287

P(X=2)=(300000000C0)(\frac{1}{500000000})^3 (1-\frac{1}{500000000})^{300000000-0}=0.098786

And if we replace we got:

P(X \geq 3) = 1- [0.548812+0.329287+0.098786]=0.023115

b) P(X \geq 3) = 1- P(X

And we can calculate this with the following excel formula:

=1-BINOM.DIST(2;300000000;(1/500000000);TRUE)

And we got:

P(X\geq 3) = 0.023115

Step-by-step explanation:

Previous concepts

The binomial distribution is a "DISCRETE probability distribution that summarizes the probability that a value will take one of two independent values under a given set of parameters. The assumptions for the binomial distribution are that there is only one outcome for each trial, each trial has the same probability of success, and each trial is mutually exclusive, or independent of each other".

Solution to the problem

Let X the random variable of interest, on this case we now that:

X \sim Binom(n=300000000, p=\frac{1}{500000000})

The probability mass function for the Binomial distribution is given as:

P(X)=(nCx)(p)^x (1-p)^{n-x}

Where (nCx) means combinatory and it's given by this formula:

nCx=\frac{n!}{(n-x)! x!}

(a) Write down the exact expression for the probability P(3 or more people will be killed by lightning in the U.S. next year). Evaluate this expression to 6 decimal places.

For this case we want this probability, we are going to use the complement rule:

P(X \geq 3) = 1- P(X

The individual probabilities are:

P(X=0)=(300000000C0)(\frac{1}{500000000})^3 (1-\frac{1}{500000000})^{300000000-0}=0.548812

P(X=1)=(300000000C0)(\frac{1}{500000000})^3 (1-\frac{1}{500000000})^{300000000-0}=0.329287

P(X=2)=(300000000C0)(\frac{1}{500000000})^3 (1-\frac{1}{500000000})^{300000000-0}=0.098786

And if we replace we got:

P(X \geq 3) = 1- [0.548812+0.329287+0.098786]=0.023115

(b) Write down a relevant approximate expression for the probability from (a). Justify briefly the approximation. Evaluate this expression to 6 decimal places.

For this case we want this probability, we are going to use the complement rule:

P(X \geq 3) = 1- P(X

And we can calculate this with the following excel formula:

=1-BINOM.DIST(2;300000000;(1/500000000);TRUE)

And we got:

P(X\geq 3) = 0.023115

7 0
3 years ago
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