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Yuliya22 [10]
3 years ago
10

Assume the random variable X is normally distributed, with mean 45 and standard deviation is 8. Find the 9th percentile

Mathematics
1 answer:
Maksim231197 [3]3 years ago
5 0

Answer:

the 9th percentile, i dont even know the first percentile

Step-by-step explanation:

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The profit y (in dollars) for a business from selling x coats is represented by y=56x . Graph the equation.
Agata [3.3K]

Answer:

The graph of the equation is also attached.

From the graph, it is clear that at x = 0, the value of y = 0

Hence, the line passes through the origin with the y-intercept 0.

Step-by-step explanation:

The slope-intercept form of the line equation

y = mx+b

where

  • m is the slope
  • b is the y-intercept

Given that the profit y (in dollars) for a business from selling x coats is represented by the equation

y=56x

comparing with the slope-intercept form of the line equation

m = 56

<u>Determining the y-intercept</u>

We know that the value of the y-intercept can be determined by setting x = 0 and determining the corresponding value of y.

substitute x = 0 in the equation

y = 56(0)

y = 0

Thus, the y-intercept b = 1

Thus,

The equation y = 5x has:

  • The slope m = 56
  • The y-intercept b = 1

The graph of the equation is also attached.

From the graph, it is clear that at x = 0, the value of y = 0

Hence, the line passes through the origin with the y-intercept 0.

4 0
3 years ago
An object moves at a constant rate. The graph shows the object's height at different times. Which equation represents the situat
zlopas [31]
<span>d. y = 15x 900</span>

Although you do not give the rates I assume the answer is D as it is the only positive multiplication. You cannot have negative height.
3 0
3 years ago
Read 2 more answers
A multiple choice exam has 20 questions. Each question has 3 possible answers; there is no partial credit. Only 1 answer out of
amid [387]

Answer:To find out the theoretical probability of the case given, we need to make certain assumptions.

First, we'll assume that he'll attempt all of the questions, i.e he'll attempt all 10 questions.

Next assumption is that each option in each question is equally likely to be marked by the student.

This pretty much leads us to a binomial probability distribution.

Conditions are:

   Answers 10 questions.

   Each question has 4 options with only one correct answer and all other incorrect answers.

   Student is equally likely to pick any outcome in any given question.

   Hence, probability of choosing correct answer is 1/4 = 0.25. Probability of choosing incorrect answer is 1–1/4 = 3/4 = 0.75.

   The number of trials is 10.

   Total number of success is exactly 8 and failure is 2 amongst the 10 questions in any particular order.

Now, calculation is fairly simple.

Binomial probability distribution is such that…

P(8 correct ; 2 wrong)

= 10C8 × (0.25)^8 × (0.75)²

= 405/1048576 ≈ 3.862380981 × 10^-4 ≈ 0.000386

Step-by-step explanation:

6 0
3 years ago
What is the surface area of the right cone with the a raidus of 3 and a slant hieght of 15
Novosadov [1.4K]
The surface area of the cone will be  : 169.65 so it would be answer A as          54 x pi = 169.646003
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3 years ago
What integer does the square root of 18 lie between
hichkok12 [17]
4 < \sqrt{18} < 5\\\\because:\\\\4=\sqrt{4^2}=\sqrt{16} < \sqrt{18} \\\\5=\sqrt{5^2}=\sqrt{25} > \sqrt{18}
8 0
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