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vesna_86 [32]
3 years ago
5

How to find the shape of distribution ??

Mathematics
1 answer:
Natali5045456 [20]3 years ago
8 0
The shape of the distribution of the time required to get an oil change at a 10 - minute oil - change facility is Unknown. However, records indicate that the mean time is 11. 2 minutes, and the standard deviation is 3. 5 minutes (a) To compute probabilities regarding the sample mean Using the normal model, what size sample would be required? (b) What is the probability that a random sample of n = LO oil changes results in a sample mean time less than 10 minutes?
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A tank contains 60 kg of salt and 1000 L of water. Pure water enters a tank at the rate 6 L/min. The solution is mixed and drain
andrey2020 [161]

Answer:

dy/dt = 7y / (t − 1000)

Step-by-step explanation:

Change in mass of salt = mass of salt going in − mass of salt going out

dy/dt = 0 − (C kg/L × 7 L/min)

where C is the concentration of salt in the tank.

The concentration is mass divided by volume:

C = y / V

The volume in the tank as a function of time is:

V = 1000 + 6t − 7t

V = 1000 − t

Therefore:

C = y / (1000 − t)

Substituting:

dy/dt = -7y / (1000 − t)

dy/dt = 7y / (t − 1000)

If we wanted, we could separate the variables and integrate.  But the problem only asks that we find the differential equation, so here's the answer.

6 0
3 years ago
Let f(x) = 2x2 - 5x + 9. Evaluate the polynomial substituting 3 for x. Find the remainder. 11 12 13 14
yaroslaw [1]
F(3)= 2(3)^2-5(3)+9
=2(9)-15+9
=18-15+9
=3+9
=12
f(3)=12 or B

7 0
3 years ago
Consider the quadratic function f(x) = –2x2 + 5x – 4. The leading coefficient of the function is .
const2013 [10]

Answer:

x = 8/5

Step-by-step explanation:

0 = - 2 x 2+5 x - 4

4 0
3 years ago
Read 2 more answers
What is the value of the expression<br>(25 - 7) X 2 + 4 + 2?<br>​
MissTica

Answer:42

Step-by-step explanation:

4 0
4 years ago
Read 2 more answers
Hey can anyone help pls thank you !
arlik [135]

Answer:

x = 16

Step-by-step explanation:

The angle vertically opposite (4x - 17) is also (4x - 17) , then

4x - 17 and 8x + 5 are same- side interior angles and sum to 180° , that is

4x - 17 + 8x + 5 = 180

12x - 12 = 180 ( add 12 to both sides )

12x = 192 ( divide both sides by 12 )

x = 16

8 0
3 years ago
Read 2 more answers
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