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4 years ago

I need help!!!! Please

Mathematics

1 answer:

Veronika [31]4 years ago

4 0

1x100,000 = 100,000
3x10,000 = 30,000
9x1,000 = 9,000
8x100 = 800
5x10 = 50
2x1 = 2
Add these all together to get your answer. Standard form is the form we usual write numbers in.

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Please help me with my homework please answer this correctly please answer everyone

daser333 [38]

Ben - 3/8

RV - 1/8

Total = 80

Ben = 3/8 ( 80 ) = ( 3 ) ( 10 ) = 30 cars

Rv = ( 1 / 8 ) ( 80 ) = ( 10 ) = 10 cars

Ben's have sold 20 cars more than RV

Hope helps!

5 0

4 years ago

What is an equation of the line that passes through the point (3,- 1) and has a slope of 2

serg [7]

Answer:

y=2x-1

Step-by-step explanation:

M is the slope for 2 and B is the y int. of -1

Hope this helped!

6 0

3 years ago

There are two machines available for cutting corks intended for use in wine bottles. The first produces corks with diameters tha

vitfil [10]

Answer:

a) $P(2.9$

And we can find this probability with the following difference:

$P(-1$

b) $P(2.9$

And we can find this probability with the following difference:

$P(-3.5$

Step-by-step explanation:

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".

Part a

Let X the random variable that represent the diameters of a population 1, and for this case we know the distribution for X is given by:

$X \sim N(3,0.1)$

Where $\mu=2$ and $\sigma=0.1$

We are interested on this probability

$P(2.9$

And the best way to solve this problem is using the normal standard distribution and the z score given by:

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

If we apply this formula to our probability we got this:

$P(2.9$

And we can find this probability with the following difference:

$P(-1$

Part b

$X \sim N(3.04,0.04)$

$P(2.9$

And we can find this probability with the following difference:

$P(-3.5$

4 0

3 years ago

The height of a stuntperson jumping off a building that is 20 m high is modeled by the equation h = 20 – 5t2, where t is the tim

Leno4ka [110]

<h2>Time Interval : 1 sec to 1.414 sec</h2>

Step-by-step explanation:

The height of the stuntperson jumping off a $20\text{ }m$ is modelled as $h\text{ }=\text{ }20\text{ }-\text{ }5t^{2}$ . Here $t$ is the time in seconds.

We have to record the person when he is between the heights $15\text{ }m\text{ and }10\text{ }m$ from the ground.

When $h\text{ }=\text{ }15$ ,

$15\text{ }=20\text{ }-\text{ }5t^{2}\\5t^{2}\text{ }=\text{ }5\\t^{2}\text{ }=\text{ }1\\t\text{ }=\text{ }1\text{ }sec$

When $h\text{ }=\text{ }10$ ,

$10\text{ }=20\text{ }-\text{ }5t^{2}\\5t^{2}\text{ }=\text{ }10\\t^{2}\text{ }=\text{ }2\\t\text{ }=\text{ }\sqrt{2}\text{ }=\text{ }1.414\text{ }sec$

The stuntperson is at height $15\text{ }m$ at $t\text{ }=\text{ }1\text{ }sec$ , and is at height $10\text{ }m$ at $t\text{ }=\text{ }1.414\text{ }sec$ .