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3 years ago

What is 892 to the nearest 100

Mathematics

2 answers:

Olegator [25]3 years ago

3 0

I’m pretty sure This rounds to 900

JulijaS [17]3 years ago

3 0

The answer is 900 because 892 is closest to 900 than 800

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A man earned $180 for working 14 hours. How many hours must he work to earn 300

RideAnS [48]

Answer:

it would be roughly 24 hours

Step-by-step explanation:

180÷14

12.8571428571

simplify to 12.85

12.85× X = 300

X=24

8 0

2 years ago

I’m having a hard time anyone knows??

Dvinal [7]

Answer:

Step-by-step explanation:

See image below:)

4 0

2 years ago

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

List price is $600.25, the rate of discount is 20%, what is the net price

Bumek [7]

First, convert the 20% to a real mathematical number. For percents, this is always done by dividing the 20% by 100%, or 20% / 100% = 0.200.

Second, find out what 20% of $600.25 is. This is the amount of the sale discount. This is always found by mulitplying 0.200 by the item's cost $600.25, like this:

0.200 x $600.25 = $120.05.

So for this sale, you'll save $120.05 on this item.

This means, the cost of the item to you is

$600.25 - $120.05 = $480.20.

Alternatively, you can think about it this way. The item is 20% off. This means you'll pay 80.000% of the total cost (100% - 20% = 80.000%).

Now what's 80.000% of the total cost?

0.800 x $600.25 = $480.20.

Just like the result above, the sale price on the item is $480.20.

Hope this helps you on your assignment! :)

5 0

2 years ago

Solve for x in both triangles

GrogVix [38]

Answer:

Step-by-step explanation:

so for the triangles in 7) they angles are the same in each, that's what the lines are saying, that they are the same angles, and because the angle are the same, the triangles are just a scale of each other we can say that the X side is just a ratio of the other triangle , or

$\frac{6}{12}$ = $\frac{10}{x}$