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3 years ago

I just wanted to let u know there is this guy named Harry Fu

Mathematics

2 answers:

amid [387]3 years ago

6 0

Good to know, I think?

kow [346]3 years ago

6 0

Things? What kind of "things?"

And ok, I'll keep that in mind thx

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Find the area enclosed by the curve y^2=x^2-x^4

yulyashka [42]

Answer: 4/3

Step-by-step explanation:

As you know this graph is a lemniscate

$4\int\limits^1_0 {x\sqrt{1-x^{2} } \, dx =\frac{4}{3} =1.33$$

4 0

3 years ago

Whats 2+2? please help i literally dont know

UkoKoshka [18]

Answer:

2 + 2 = 4

Step-by-step explanation:

8 0

2 years ago

Find the altitude of a cylinder with with a radius of 9 and a surface area of approximately 791.68 units2.

Vika [28.1K]

In this question , it is given that we have a cylinder with with a radius of 9 and a surface area of approximately 791.68 units square.

The formula of surface area of cylinder is

$A= 2 \pi r^2 + 2 \pi r h$

Substituting the values of A and r, we will get

$791.68 = 2* \pi * 9^2 + 2 * \pi * 9*h
\\
791.68 = 162 \pi + 18 \pi h
\\
791.68 -162 \pi = 18 \pi h
\\
h = \frac{791.68 -162 \pi}{18 \pi}
\\
h =5 units$

So the height of the cylinder is 5 units .

4 0

3 years ago

Whats the answers can anyone answer this question please

topjm [15]

Answer:

1. B

2. A

Step-by-step explanation:

10^{-2} means that you move the decimal back two times

B is the only option that represents that correctly.

5 * 10^{4} = 50000

2.5 * 10^{2} = 250

50000/250 = 200

Out of the options, A is the only option in which the equation also equals 200.

4 0

2 years ago

A multiple choice test has four possible answers for each question. Let X be the number of correct responses in a test of 100 qu

dimulka [17.4K]

Answer:

a. 4.33.

Step-by-step explanation:

If there is only one correct answer out of four alternatives, the expected proportion of correct answers is p =0.25

Sample size (n) = 100 questions

The standard deviation of a proportion 'p' is given by:

$s=\sqrt{\frac{p*(1-p)}{n} }$

Applying the given data:

$s=\sqrt{\frac{0.25*(1-0.25)}{100}}\\s=0.0433$

If X is the number of correct responses in 100 guesses, the standard deviation of X is:

$\sigma = n*s=100*0.0433\\\sigma = 4.33$

The standard deviation of X is 4.33 questions.

7 0

2 years ago