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3 years ago

Helppppppppppppppppppppppppppppppppppppp

Mathematics

2 answers:

nika2105 [10]3 years ago

4 0

Answer:the value of 9 would be 0,9

Step-by-step explanation:because where the 9 is marked at it’s on the 0 line

cricket20 [7]3 years ago

4 0

Answer:

Okay whats your question?

Step-by-step explanation:

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HELP ME PLEASE ASAP

lakkis [162]

So I have the same problem with you

8 0

2 years ago

Consider the line integral Z C (sin x dx + cos y dy), where C consists of the top part of the circle x 2 + y 2 = 1 from (1, 0) t

pashok25 [27]

Direct computation:

Parameterize the top part of the circle $x^2+y^2=1$ by

$\vec r(t)=(x(t),y(t))=(\cos t,\sin t)$

with $0\le t\le\pi$ , and the line segment by

$\vec s(t)=(1-t)(-1,0)+t(2,-\pi)=(3t-1,-\pi t)$

with $0\le t\le1$ . Then

$\displaystyle\int_C(\sin x\,\mathrm dx+\cos y\,\mathrm dy)$

$=\displaystyle\int_0^\pi(-\sin t\sin(\cos t)+\cos t\cos(\sin t)\,\mathrm dt+\int_0^1(3\sin(3t-1)-\pi\cos(-\pi t))\,\mathrm dt$

$=0+(\cos1-\cos2)=\boxed{\cos1-\cos2}$

Using the fundamental theorem of calculus:

The integral can be written as

$\displaystyle\int_C(\sin x\,\mathrm dx+\cos y\,\mathrm dy)=\int_C\underbrace{(\sin x,\cos y)}_{\vec F}\cdot\underbrace{(\mathrm dx,\mathrm dy)}_{\vec r}$

If there happens to be a scalar function $f$ such that $\vec F=\nabla f$ , then $\vec F$ is conservative and the integral is path-independent, so we only need to worry about the value of $f$ at the path's endpoints.

This requires

$\dfrac{\partial f}{\partial x}=\sin x\implies f(x,y)=-\cos x+g(y)$

$\dfrac{\partial f}{\partial y}=\cos y=\dfrac{\mathrm dg}{\mathrm dy}\implies g(y)=\sin y+C$

So we have

$f(x,y)=-\cos x+\sin y+C$

which means $\vec F$ is indeed conservative. By the fundamental theorem, we have

$\displaystyle\int_C(\sin x\,\mathrm dx+\cos y\,\mathrm dy)=f(2,-\pi)-f(1,0)=-\cos2-(-\cos1)=\boxed{\cos1-\cos2}$

3 0

3 years ago

Light travels at the speed of approximately 3.0 × 108 meters per second. Find the time in minutes required for light to travel f

expeople1 [14]

Speed = distance / time => time = distance / speed
speed = 3x10^8 x 60 = 180x10^8 m per minute
time = 1.5x10^11/180x10^8 = 150x10^9/180x10^8 = 5/6x10 = 8,3 minutes

6 0

3 years ago

In a survey of 1200 teenagers, 48% said they are involved in an extracurricular activity. What is the margin of error for the su

nevsk [136]

The answer is 1200 teenagers

6 0

3 years ago

Someone plz help me litterly no one would bother to help me so plz I beg of u due today

goldfiish [28.3K]

<h2>PLEASE MARK BRAINLIEST!</h2>

Answer:

I'm going to help youuuuu.

Step-by-step explanation:

{1}

Your answer is A) because the rise/run is -2/4x, which simplifies to -1/2x, which is option A).

{2}

Dario's salary is B) $12 per hour. This is because, in 5 hours, Dario makes 60 dollars. If you find the unit rate of $60 in 5 hours, the answer is $12 per hour.

{3}

A) Between x = -6 and x = -2

I hope this helps! I am sorry if any of these are incorrect!

- sincerelynini

8 0

3 years ago