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3 years ago

Help me with this someone thanks

Mathematics

2 answers:

makkiz [27]3 years ago

7 0

The answer would be $7,155 ive attached the working aout below if you happen to need it.

Sauron [17]3 years ago

3 0

Either 1,655 or 15,655 depends on weather or not the loan is a check or cash

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g If a random sample of 18 deliveries was selected instead and the standard deviation of these delivery times was found to be 9.

lana [24]

Answer:

We can use the z score formula given by:

$z= \frac{\bar X -\mu}{\frac{\sigma}{\sqrt{n}}}$

If we use this formula we got:

$z=\frac{21-20}{\frac{9.31}{\sqrt{18}}}= 0.456$

$z=\frac{25-20}{\frac{9.31}{\sqrt{18}}}= 2.279$

And using a calculator, excel or the normal standard table and we have that:

$P(0.456$

Step-by-step explanation:

We assume this previous info: It is known that the amounts of time required for room-service delivery at a certain Marriott Hotel are Normally distributed with the average delivery time of 20 minutes.

Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".

Solution to the problem

Let X the random variable that represent the delivery times of a population, and for this case we know the distribution for X is given by:

$X \sim N(20,9.31)$

Where $\mu=20$ and $\sigma=9.31$

Since the distribution for X is normal then the distribution for the sample mean $\bar X$ is given by:

$\bar X \sim N(\mu, \frac{\sigma}{\sqrt{n}})$

And we can use the z score formula given by:

$z= \frac{\bar X -\mu}{\frac{\sigma}{\sqrt{n}}}$

If we use this formula we got:

$z=\frac{21-20}{\frac{9.31}{\sqrt{18}}}= 0.456$

$z=\frac{25-20}{\frac{9.31}{\sqrt{18}}}= 2.279$

And using a calculator, excel or the normal standard table and we have that:

$P(0.456$

6 0

3 years ago

Find the product of 5 and 539.

iris [78.8K]

The product of 5 and 539 is 2695

<h3 /><h3>What does it mean to find the product of numbers:</h3>

Finding the product of numbers simply means multiplying 2 or more numbers.

Therefore, the product of 5 and 539 can be done as follows:

5 × 539

Multiplication or product sign is denoted as ×.

Therefore,

5 × 539 = 2695

learn more on product: brainly.com/question/24867438?referrer=searchResults

8 0

3 years ago

Read 2 more answers

What is the simplified <br> square root of 130?? <br><br> I’m really stuck

Svet_ta [14]

Answer:

The square root of 130 would be 11.4017543. Rounding to the nearest tenth, we would get 11.4, because the value 0 is below 5. Rounding 11.4 to the nearest whole number, we would get 11, because the value 4 is below 5. So either 11 or 11.4 works, depending on if you are looking for a decimal or a whole number.

Hope this helps ya :D

8 0

3 years ago

A Blue Jay wanted to store some acorns for the winter. If she hides 18 acorns per tree, she will be left with four acorns; if sh

ch4aika [34]

Remark

This is a nice problem especially if you like blue jays! They actually do things like this.

Equations.

Let the number of trees = T

Let the number of acorns = A

20*T = A + 4 Read that carefully. There are 4 acorns left over. The number stored = A. The left over ones make 4 more than were stored.

Second equation
18*T = A - 4 Here we have 4 less than could be stored to full capacity.

Solution

20T = A + 4

<u>18T = A - 4 </u> Subtract

2T = 8 Divide by 2

T = 8/2; T = 4 Answer

20T = A + 4

20*4 = A

80 - 4 = A

A = 76 Answer

Answers

The number of Trees = T

The number of acorns = 76

7 0

3 years ago

Juan's car used 12 gallons of gasoline to travel 456 miles. How many miles do I travel for each gallon of gasoline?

Brums [2.3K]

Answer:

38 miles per gallon

Step-by-step explanation:

465 miles / 12 gallons

38 miles / gallon

3 0

3 years ago