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3 years ago

Find the arclength along a circle of diameter 3.9 3.9 meters which subtends an angle of 6.7 6.7 radians.

1 answer:

6 0

Arc length = r θ =(3.9/2)*6.7 = 13.065 m.
Note: This arc angle is over 2 π , meaning that it will more than wrap around the circle.

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Why does the square root of 64 have a positive and negative value?

barxatty [35]

Because it means it has two answers when -8×-8 it equals 64 so is 8×8
in math when negative multiply negative it will be positive...

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3 years ago

7/9+5/6·1/3<br> write it in simplest form

Talja [164]

Answer:

19/18

Step-by-step explanation:

simplify x/3

simplify 5/6

simplify 7/9

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3 years ago

A mean average of 70 or better on five exams is needed for a final grade of C. Jeffery Matthews first four exam grades are 75, 6

erastova [34]

Answer:38

Step-by-step explanation:

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3 years ago

If im was born on june 9th of 1993 from 2015 she still alive how old is she now?

Vladimir79 [104]

If you're born on June 9th in 1993, on June 9th in 2015 you would have your 22nd birthday (2015-1993=22).

So you're 22 years old, and, as of today, 17 days tool (22 years 17 days).

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3 years ago

Determine whether or not the vector field is conservative. If it is conservative, find a function f such that F = ∇f. (If the ve

djyliett [7]

We're looking for $f(x,y,z)$ such that $\nabla f(x,y,z)=\vec F(x,y,z)$ , which requires

$\dfrac{\partial f}{\partial x}=xyz^2$

$\dfrac{\partial f}{\partial y}=x^9yz^2$

$\dfrac{\partial f}{\partial z}=x^9y^2z$

Integrating both sides of the first PDE wrt $x$ gives

$f(x,y,z)=\dfrac12x^2yz^2+g(y,z)$

Differenting this wrt $y$ gives

$\dfrac{\partial f}{\partial y}=x^9yz^2=\dfrac12x^2z^2+\dfrac{\partial g}{\partial y}$

$\implies\dfrac{\partial g}{\partial y}=\dfrac12x^2z^2(2x^7y-1)$

but we're assuming $g(y,z)$ is a function that doesn't depend on $x$ , which is contradicted by this result, and so there is no such $f$ and $\vec F$ is not conservative.

8 0

4 years ago