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Nookie1986 [14]
3 years ago
15

HELPPP

Mathematics
2 answers:
DIA [1.3K]3 years ago
4 0

Answer:

it is an infinite discontinuity.

Step-by-step explanation:

disa [49]3 years ago
3 0

Answer:

D. Removeable

Step-by-step explanation:

ed2021

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Suppose that the lifetime of tv tubes are normally distributed with a standard deviation of 1.1 years. Suppose that exactly 20%
IrinaK [193]

Answer:

4.924 years

Step-by-step explanation:

Lets denote X the lifetime of a tv tube (In years). X has distribution N(\mu, 1.1) , with \mu unknown.

We know that P(X < 4) = 0.2. Using this data, we can find the value of \mu throught standarization.

Lets call Z = \frac{X - \mu}{1.1} the standarization of X. Z has distribution N(0,1), and its cummulative function, \phi is tabulated. The values of \phi can be found in the attached file.

P(X < 4) = P(\frac{X - \mu}{1.1} < \frac{4 - \mu}{1.1}) = P(Z < \frac{4 - \mu}{1.1}) = \phi(\frac{4 - \mu}{1.1}) = 0.2

The value q such that \phi (q) = 0.2 doesnt appear on the table. We can find it by using the symmetry of the normal density function. The opposite of q, -q must verify that \phi(-q) = 0.8 , hence -q must be equal to 0.84. Thus, q = -0.84

But this value of q should match with the number \frac{4 - \mu}{1.1} , so we have

\frac{4- \mu}{1.1} = -0.84

4 - \mu = 1.1 * (-0.84) = -0.924

\mu = 4 - (-0.924) = 4.924

Thus, the expected lifetime of TV tubes is 4.924 years.

I hope this works for you!

Download pdf
7 0
4 years ago
Is this correct? im just suspicious about every box being checked.
Anvisha [2.4K]

Answer:

yes, all of it is correct

Step-by-step explanation:

For the two triangles to be congruent, you would need the following angles and lengths to be congruent with each other.

6 0
3 years ago
If edgar spent $3.00 talking to mary for 30 minutes , between what hours did he make the call?
tamaranim1 [39]
Is there more to the question? Because it could be any hours..
7 0
3 years ago
What is the reason for each step in the solution of the inequality? 28−3(x−2)&lt;5x+10
NeTakaya

Answer:

1. 28 − 3(x − 2) < 5x + 10            Given

2. 28 − (3)(x) + (-3)(-2) < 5x + 10       Distributive Property <em>a(b + c) = ab+ ac</em>

28 − 3x + 6 < 5x + 10

3.  (28 + 6) - 3x < 5x + 10             Combine Like Terms

34 − 3x < 5x + 10

4. 34 - 3x + 3x < 5x + 3x + 10             Addition Property of Order

34 < 8x + 10

5. 34 - 10 < 8x + 10 - 10        Subtraction Property of Order

24 < 8x

6. 24/8 < 8x/8        Division Property of Order

3 < x

5 0
3 years ago
List the measurements from smallest to largest 7 cm 18 mm 1 m 3 dm
ikadub [295]
3dm, 18mm, 7cm, 1m...hope I helped!
4 0
3 years ago
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