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2 years ago

Derive the followiri) v2 = u? + 2asii) s = ut +at

Mathematics

1 answer:

Masteriza [31]2 years ago

3 0

Three little birds out of my window and they told me I don’t need to worry

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A particular sale involves four items randomly selected from a large lot that is known to contain 9% defectives. Let X denote th

umka2103 [35]

Answer:

The expected repair cost is $3.73.

Step-by-step explanation:

The random variable X is defined as the number of defectives among the 4 items sold.

The probability of a large lot of items containing defectives is, p = 0.09.

An item is defective irrespective of the others.

The random variable X follows a Binomial distribution with parameters n = 9 and p = 0.09.

The repair cost of the item is given by:

$C=3X^{2}+X+2$

Compute the expected cost of repair as follows:

$E(C)=E(3X^{2}+X+2)$

$=3E(X^{2})+E(X)+2$

Compute the expected value of X as follows:

$E(X)=np$

$=4\times 0.09\\=0.36$

The expected value of X is 0.36.

Compute the variance of X as follows:

$V(X)=np(1-p)$

$=4\times 0.09\times 0.91\\=0.3276\\$

The variance of X is 0.3276.

The variance can also be computed using the formula:

$V(X)=E(Y^{2})-(E(Y))^{2}$

Then the formula of $E(Y^{2})$ is:

$E(Y^{2})=V(X)+(E(Y))^{2}$

Compute the value of $E(Y^{2})$ as follows:

$E(Y^{2})=V(X)+(E(Y))^{2}$

$=0.3276+(0.36)^{2}\\=0.4572$

The expected repair cost is:

$E(C)=3E(X^{2})+E(X)+2$

$=(3\times 0.4572)+0.36+2\\=3.7316\\\approx 3.73$

Thus, the expected repair cost is $3.73.

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3 years ago

What is the domain of the function?

seraphim [82]

Answer:

All real numbers

Step-by-step explanation:

Since we see the arrows going infinitely to the left and right of the graph, this means that the domain of this function is all real numbers

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3 years ago

Tom was using wire of the following thicknesses .33 mm, .275 mm, .25 mm, and .3 mm for some electrical work. Order the wire from

RideAnS [48]

$\bf \begin{array}{ll|ll}
&padded&sorted&\stackrel{unpadded}{sorted}\\
----&----&----&----\\
.33&0.330&330&.33\\
.275&0.275&300&.3\\
.25&0.250&275&.275\\
.3&0.300&250&.25\\
\end{array}$

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3 years ago

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15=3/5(6x + 20) solve for x

NISA [10]

This is the answer to the problem. Hope it helps

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3 years ago

Give the function f(x) = 2(2)×, section A is from x = 1 to x =2 and section B is from x = 3 to x = 4

iogann1982 [59]

Answer:

I believe this is related to a previous post by you

Step-by-step explanation:

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3 years ago

Derive the followiri) v2 = u? + 2asii) s = ut +at​

Derive the followiri) v2 = u? + 2asii) s = ut +at