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2 years ago

Sorry but plz forgive me for you feeling like I’m using you guys :(

Mathematics

1 answer:

vaieri [72.5K]2 years ago

6 0

Step-by-step explanation:

67yd² is the answer...........

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Find the surface area of the following prism.

Lynna [10]

Answer: 350 square inches

The surface area formula of a trapezoidal prism is h (b + d) + l (a + b + c + d)

4(9+7) + 11 (5+7+9 +5)

--> 350

3 0

2 years ago

2. In the last 32 days, a builder complete 500

HACTEHA [7]

Answer:

The answer is 15.625 square meters per day.

Step-by-step explanation:

To solve this, divide the amount (500) by the amount of time it took to do it (32 days), which gives you 15.625 square meters per day.

4 0

2 years ago

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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

DENIUS [597]

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

$E[X]=\displaystyle\int_{-\infty}^\infty x\,f_X(x)\,\mathrm dx=\frac1{80}\int_{670}^{750}x\,\mathrm dx=710$

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

$\sqrt{V[X]}=\sqrt{\dfrac{1600}3}\approx23.09$

8 0

2 years ago

I need to know the whole process of this equation

Nat2105 [25]

X=-8/z-2y...
z=2y-8/x...
y=xz/2+4

8 0

3 years ago

What is the measure of angel A rounded to nearest whole number ?

snow_lady [41]

Use inverse cosine here because you have the side adjacent to angle A and the hypotenuse. On your calculator, press the 2nd key then cosine to see this on your display $cos^{-1}$ then enter 8/17 to give you an angle measure of 62 degrees.

4 0

3 years ago

Read 2 more answers