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ikadub [295]
3 years ago
6

HELPPPPPPP!!!

Mathematics
1 answer:
insens350 [35]3 years ago
5 0
It should be 7.285 i think I don’t know
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Vail Resorts pays part-time seasonal employees at ski resorts on an hourly basis. At a certain mountain, the hourly rates have a
notsponge [240]

Answer:

z=0.842

And if we solve for a we got

\mu=13.16 +0.842*3=15.69

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".  

Solution to the problem

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

X \sim N(\mu,3)  

For this part we want to find a value a, such that we satisfy this condition:

P(X>13.16)=0.20   (a)

P(X   (b)

Both conditions are equivalent on this case. We can use the z score again in order to find the value a.  

As we can see on the figure attached the z value that satisfy the condition with 0.80 of the area on the left and 0.20 of the area on the right it's z=0.842. On this case P(Z<0.842)=0.8 and P(z>0.842)=0.20

If we use condition (b) from previous we have this:

P(X  

P(z

But we know which value of z satisfy the previous equation so then we can do this:

z=0.842

And if we solve for a we got

\mu=13.16 +0.842*3=15.69

3 0
2 years ago
A robot that makes _/6 of a boat per day will make 5 boats in 6 days
MatroZZZ [7]
For what I understand, if a robot was to make 5/6 of a boat per day, in 6 days it will have made 5 boats. The answer is 5
4 0
2 years ago
A graph of a quadratic function is shown below.
stira [4]

Answer:

d. (10,800)

Step-by-step explanation:

Vertex appears to be at x = 10

Vertex: (10,800)

6 0
3 years ago
A plumber charges $96 an hour for making house calls to do plumbing work. Write the function and then find the domain and range
krek1111 [17]

Answer:

i forgot

Step-by-step explanation:

7 0
3 years ago
Shelley wants to purchase a cell phone package, which includes a free phone. The cost of the package is $0.10 per minute, for th
GarryVolchara [31]

Answer:

The function would be linear because the rate of change is constant.

Step-by-step explanation:

Given

Base= \$89.00

Rate = \$0.10 per minute

See attachment for complete question and options

First, we write the function that calculates the cost (C(t)) for t minutes.

This is calculated as:

Cost = Base + Rate * t

C(t) = 89.00 + 0.10 * t

C(t) = 89.00 + 0.10t

Rewrite as:

C(t) = 0.10t + 89.00

A function that has the above format is referred to as a linear function which has the general format

f(x) = mx + b

Where

m represents the slope/rate and it is constant

From the list of given options, (a) is correct.

6 0
3 years ago
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