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2 years ago

There are 6 girls and 18 boys in a class. What percentage of the class are girls?

Mathematics

2 answers:

lisabon 2012 [21]2 years ago

5 0

33.3% are girls in the class

grandymaker [24]2 years ago

4 0

Answer:

25% are girls

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Calculus 2 Master needed, evaluate the indefinite integral of: <img src="https://tex.z-dn.net/?f=%5Cint%5C%28%20%28lnx%29%5E2%7D

viva [34]

Answer:

$\int (\ln(x))^2dx=x(\ln(x)^2-2\ln(x)+2)+C$

Step-by-step explanation:

So we have the indefinite integral:

$\int (\ln(x))^2dx$

This is the same thing as:

$=\int 1\cdot (\ln(x))^2dx$

So, let's do integration by parts.

Let u be (ln(x))². And let dv be (1)dx. Therefore:

$u=(\ln(x))^2\\\text{Find du. Use the chain rule.}\\\frac{du}{dx}=2(\ln(x))\cdot\frac{1}{x}$

Simplify:

$du=\frac{2\ln(x)}{x}dx$

And:

$dv=(1)dx\\v=x$

Therefore:

$\int (\ln(x))^2dx=x\ln(x)^2-\int(x)(\frac{2\ln(x)}{x})dx$

The x cancel:

$=x\ln(x)^2-\int2\ln(x)dx$

Move the 2 to the front:

$=x\ln(x)^2-2\int\ln(x)dx$

(I'm not exactly sure how you got what you got. Perhaps you differentiated incorrectly?)

Now, let's use integrations by parts again for the integral. Similarly, let's put a 1 in front:

$=x\ln(x)^2-2\int 1\cdot\ln(x)dx$

Let u be ln(x) and let dv be (1)dx. Thus:

$u=\ln(x)\\du=\frac{1}{x}dx$

And:

$dv=(1)dx\\v=x$

So:

$=x\ln(x)^2-2(x\ln(x)-\int (x)\frac{1}{x}dx)$

Simplify the integral:

$=x\ln(x)^2-2(x\ln(x)-\int (1)dx)$

Evaluate:

$=x\ln(x)^2-2(x\ln(x)-x)$

Now, we just have to simplify :)

Distribute the -2:

$=x\ln(x)^2-2x\ln(x)+2x$

And if preferred, we can factor out a x:

$=x(\ln(x)^2-2\ln(x)+2)$

And, of course, don't forget about the constant of integration!

$=x(\ln(x)^2-2\ln(x)+2)+C$

And we are done :)

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2 years ago

Identify, whether the given polynomial is a monomial, binomial, or a trinomial.

Finger [1]

That's a monomial; it has one variable, one coefficient, and one degree.

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2 years ago

Please help I will reward brainliest

Oduvanchick [21]

Answer:

since the shape is deformed and round and on a grid we cant find out the answer to this question call here 800-273-8255

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2 years ago

BIG POINT AND PLEASE ANSWER IT CORRECTLY

Yanka [14]

Ax+By=C

y=-2x+8

Answer :2x+y=8

I think this is the answer.

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2 years ago

In comparing two distributions, which attribute would you not compare?

krok68 [10]

A. Joint frequency, it’s right I checked it myself

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2 years ago

There are 6 girls and 18 boys in a class. What percentage of the class are girls?​

There are 6 girls and 18 boys in a class. What percentage of the class are girls?