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3 years ago

10

Pls anwser this question pls it’s easy math I really need it look at the pic

1 answer:

attashe74 [19]3 years ago

6 0

Answer:

I beleive the answer is D

Step-by-step explanation:

You might be interested in

A kilometer is 3,280.8 feet. how many feet long is a meter?

Stells [14]

3280.8 / 1000 = 3.2803ft

3 0

3 years ago

According to the MIT Airline Data Project, American Airlines controlled 15.5% of the domestic market during a recent year. A ran

andrey2020 [161]

Answer:

$P(20$

And we can use the z score given by:

$z = \frac{x-\mu}{\sigma}$

And if we find the z score for 20 and 25 we got:

$z = \frac{20-19.375}{4.046}=0.154$

$z = \frac{25-19.375}{4.046}=1.390$

And we have the probability given by:

$P(20$

And we can find this probbaility with this difference:

$P(0.154< Z$

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".

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

$X \sim Binom(n=125, p=0.155)$

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:

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

We need to check the conditions in order to use the normal approximation.

$np=125*0.155=19.375 \geq 10$

$n(1-p)=125*(1-0.155)=105.625 \geq 10$

So we see that we satisfy the conditions and then we can apply the approximation.

If we appply the approximation the new mean and standard deviation are:

$E(X)=np=125*0.155=19.375$

$\sigma=\sqrt{np(1-p)}=\sqrt{125*0.155(1-0.155)}=4.046$

So then we can approximate the random variable like this:

$X\sim N(\mu = 19.375 , \sigma=4.046)$

And we are interested on this probability:

$P(20$

And we can use the z score given by:

$z = \frac{x-\mu}{\sigma}$

And if we find the z score for 20 and 25 we got:

$z = \frac{20-19.375}{4.046}=0.154$

$z = \frac{25-19.375}{4.046}=1.390$

And we have the probability given by:

$P(20$

And we can find this probbaility with this difference:

$P(0.154< Z$

4 0

3 years ago

Kate has a box of red nibbon and bhie ribbons The ratio of red ribbons to total ribbons is 5 14 Choose all the statements that a

m_a_m_a [10]

D and C.

You already stated the total ratio is 14:5 so that gives you the answer of choice C.

And 5+9=14 so that gives you the answer of choice D.

8 0

3 years ago

Please answer this correctly

FinnZ [79.3K]

Answer:

6.3 ft

Step-by-step explanation:

The perimeter of a parallelogram is given by

P = 2(l+w)

49.6 = 2 (18.5 +t)

Divide by 2

49.6/2 = 2/2 (18.5 +t)

24.8 = 18.5+t

Subtract 18.5

24.8-18.5 = t

6.3 = t

6 0

3 years ago

Read 2 more answers

Dr. Silas studies a culture of bacteria under a microscope. The function b1t=500(1.6)t represents the number of bacteria t hours

aliya0001 [1]

Answer:

b is your answer

Step-by-step explanation:

8 0

2 years ago