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2 years ago

15

I don't understand..i just learned this but the teacher told us to study by ourselves please help

1 answer:

slamgirl [31]2 years ago

5 0

Answer:

X=6

Step-by-step explanation:

As you know x then you can use tan to do

$\tan( \binom{5}{6} ) = o \\$

Then you will get the answer of 39°48'

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An exponential random variable has a standard deviation of 16. Calculate The probability that it takes on a value < 11. Use 3

antiseptic1488 [7]

Answer:

$P(X$

And using the cdf we got:

$P(X$

Step-by-step explanation:

Previous concepts

The exponential distribution is "the probability distribution of the time between events in a Poisson process (a process in which events occur continuously and independently at a constant average rate). It is a particular case of the gamma distribution". The probability density function is given by:

$P(X=x)=\lambda e^{-\lambda x}, x>0$

And 0 for other case. Let X the random variable that represent the random variable of interest and we know that the distribution is given by:

$X \sim Exp(\lambda)$

We know the variance on this case given by :

$Var(X) = \frac{1}{\lambda^2}$

So then the deviation is given by:

$Sd(X) = \frac{1}{\sqrt{\lambda}}$

And if we solve for $\lambda$ we got:

$\lambda = (\frac{1}{16})^2 = \frac{1}{256}$

The cumulative distribution function for the exponential distribution is given by:

$F(x) = 1- e^{-\lambda x}$

Solution to the problem

And for this case we want to find this probability:

$P(X$

And using the cdf we got:

$P(X$

5 0

3 years ago

If PQ bisects CX at point J, and if JX = 4y and CJ = y+9 find y

MAXImum [283]

Since PQ bisects CX at point J, JX=CJ

4y=y+9
-y -y
3y=9
divide by 3
y=3

3 0

3 years ago

If c ī b, what is m<2?

natulia [17]

Answer:

<2 = 90

Step-by-step explanation:

If the lines are perpendicular, the angles are 90 degrees

3 0

3 years ago

The function g is a transformation of f. If g has a y-intercept at -1, which of the following functions could represent g?

scZoUnD [109]

The answer is C. G(x)= f(x) -1

4 0

3 years ago

Regular triangular pyramid has 6 cm long base edge and slant height k=9 cm. Find the lateral area of the pyramid.

gregori [183]

Answer:

81 cm²

Step-by-step explanation:

Since, the lateral face of a triangular pyramid is a triangle,

Given,

The base edge or the base of one lateral face of pyramid, a = 6 cm,

And, the slant height or the height of the face, k = 9 cm,

Thus, the area of one lateral face of the pyramid,

$A=\frac{1}{2}\times a\times k$

$=\frac{1}{2}\times 6\times 9$

$=\frac{54}{2}$

$=27\text{ square cm}$

We know that, a Regular triangular pyramid has 3 lateral faces,

Hence, the total lateral area of the pyramid,

$L.A.=3\times\text{ The area of one lateral face}$

$=3\times 27$

$=81\text{ square cm}$

5 0

2 years ago

Read 2 more answers