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3 years ago

2. Simplify √-72 (2 points) A.) 6√2 B.) 6√-2 C.) 6√2i D.) 6i√2

Mathematics

1 answer:

ruslelena [56]3 years ago

3 0

Answer:

the answer would be

D.) 6i√2

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3 years ago

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3 years ago

A random variable X follows the uniform distribution with a lower limit of 670 and an upper limit of 750.a. Calculate the mean a

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You can compute both the mean and second moment directly using the density function; in this case, it's

$f_X(x)=\begin{cases}\frac1{750-670}=\frac1{80}&\text{for }670\le x\le750\\0&\text{otherwise}\end{cases}$

Then the mean (first moment) is

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and the second moment is

$E[X^2]=\displaystyle\int_{-\infty}^\infty x^2\,f_X(x)\,\mathrm dx=\frac1{80}\int_{670}^{750}x^2\,\mathrm dx=\frac{1,513,900}3$

The second moment is useful in finding the variance, which is given by

$V[X]=E[(X-E[X])^2]=E[X^2]-E[X]^2=\dfrac{1,513,900}3-710^2=\dfrac{1600}3$

You get the standard deviation by taking the square root of the variance, and so

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3 years ago

B=ym+y for m m= help me solve thank u

Sveta_85 [38]

B = ym + y

B - y = ym

(B - y) / y = m
or
B/y - 1 = m

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3 years ago

2. Simplify √-72 (2 points) A.) 6√2 B.) 6√-2 C.) 6√2i D.) 6i√2​

2. Simplify √-72 (2 points) A.) 6√2 B.) 6√-2 C.) 6√2i D.) 6i√2