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GREYUIT [131]
3 years ago
15

NEED HELP ASAP

Mathematics
2 answers:
Reil [10]3 years ago
8 0
The 1st is 25 cm. 

Your welcome: Saumith/Matvey/Shreyas/Alec/Vendanti/RSM student/ whoever you are =)
ki77a [65]3 years ago
6 0
3. the equation is simple 

These are the two consectutive numbers x and x+1

√x = x - 3

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A water park charges $5 for entry into the park and an additional $2 for each of the big waterslides. Steven spent $17 on his vi
igomit [66]
5 is a constant - you pay $5 before you go on any of the waterslides.
let the number of waterslides Steven went on = x

5 +2x =17  ($5 plus $2 per waterslide ride = 17)

Answer a is correct.
By the way, Steven went on 6 waterslide rides.
4 0
3 years ago
If the filling equipment is functioning properly what is the probability that the volume of oil in a randomly selected barrel wi
Sophie [7]

Answer:

P(X>55.4)=P(\frac{X-\mu}{\sigma}>\frac{55.4-\mu}{\sigma})=P(Z>\frac{55.4-55}{0.5})=P(Z>0.8)

P(Z>0.8)=1-P(Z\leq 0.8)

P(Z>0.8)=1-0.788=0.212

Step-by-step explanation:

Assuming this previous info : "Trucks carry barrels of crude oil from a port in Texas to a distributer in New Mexico on long  trailers. Filling equipment is used to fill the barrels with the oil. When functioning properly,  the actual volume of oil loaded into each barrel by the filling equipment at the port is  approximately normally distributed with a mean of 55 gallons and a standard deviation of 0.5  gallons. If the mean is greater than 55.4 gallons, the filling mechanism is overfilling."

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 amount filling of a population, and for this case we know the distribution for X is given by:

X \sim N(55,0.5)  

Where \mu=55 and \sigma=0.5

We are interested on this probability

P(X>55.4)

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(X>55.4)=P(\frac{X-\mu}{\sigma}>\frac{55.4-\mu}{\sigma})=P(Z>\frac{55.4-55}{0.5})=P(Z>0.8)

And we can find this probability using the complement rule:

P(Z>0.8)=1-P(Z\leq 0.8)

And in order to find these probabilities we can use tables for the normal standard distribution, excel or a calculator.  

P(Z>0.8)=1-0.788=0.212

8 0
3 years ago
What is the range of these wages<br> 245,140,525,163,195,174,140
Veronika [31]
The range is about 226
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Use the parabola tool to graph the quadratic function
shepuryov [24]

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6 0
3 years ago
Tell what each of the residual plots below indicates about the appropriateness of the linear model
ELEN [110]
The closer the points are/more uniform they are to the residual line, the better the fit.  The more skewed and scattered they are, the model is a worse fit.
3 0
3 years ago
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