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3 years ago

I need help right now please! I have 2 questions!

Mathematics

2 answers:

yKpoI14uk [10]3 years ago

5 0

1 is 28
2 is 13, 84, 85

Figure both by the Pythagorean Theorem<span />

Lelu [443]3 years ago

4 0

I think it is the second answer for the first question and the second question is the 4th answer

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g A fair coin is tossed 20 times. The number of heads observed is the count X of successes. Give the distribution of X . Choose

Nuetrik [128]

Answer:

We assume that we have a fair coin that is $p(Head)=p(Tails)=0.5$

For this case we define the random variable X as "number of heads observed in 20 times". The distribution for X is given by:

$X \sim Binom(n=20, p=0.5)$

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:

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

Step-by-step explanation:

Previous concepts

A Bernoulli trial is "a random experiment with exactly two possible outcomes, "success" and "failure", in which the probability of success is the same every time the experiment is conducted". And this experiment is a particular case of the binomial experiment.

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".

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:

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

Solution to the problem

We assume that we have a fair coin that is $p(Head)=p(Tails)=0.5$

For this case we define the random variable X as "number of heads observed in 20 times". The distribution for X is given by:

$X \sim Binom(n=20, p=0.5)$

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:

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

3 0

3 years ago

Sasha runs 8 miles on Thursday, then runs 8 more miles on Friday, she ran 1/2 mile on Saturday. hHOW MANY MILES DID SHE RUN? PLE

Over [174]

Answer:

16 1/2 miles

Step-by-step explanation:

3 0

3 years ago

Read 2 more answers

Which choice shows the product off 22 and 49?

liq [111]

Answer:

1,078

Step-by-step explanation:

I got that answer by multiplying 22 and 49. We know that product means to use the multiplication operation so our problem would look like this:

22 * 49 = 1,078

6 0

3 years ago

Work out the area of this semi circle

kirill [66]

Answer:

39.27

Step-by-step explanation:

The area of a semi-circle is pi times the radius squared divided by 2. So basically standard area of a circle formula (pi times the radius squared) but then you add in the extra step of dividing it by 2.

The formula looks like this:

π × r² ÷ 2

The radius is half the diameter of the circle. So basically think of it as a line to the middle of the circle. Our diameter is 10, (the diameter is the entire length of the circle. It gives us this already. If you need diameter and only have the radius add the radius together twice or multiply it by 2 to get the diameter. Fun fact..?)

and it tells us to substitute pi for 3.142.

So, plugging our numbers in we get:

3.142 x 5^2 ÷ 2 = 39.275.

Cut out the 3rd decimal place (5) as it tells us to only include the first 2 decimal places, and we finally end up with 39.27.

<u>Hope this helps and have a nice day!</u>

5 0

2 years ago

What dy did mrter thother king dye

Vesnalui [34]

If your asking why he got shot
If your asking when it was April 4 1968

Hope it helps
Couldn’t understand what u wrote

8 0

3 years ago

Read 2 more answers