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3 years ago

A round pen is 50ft in diameter, what is the circumference of the round pen?

Mathematics

2 answers:

Pepsi [2]3 years ago

6 0

C=πd
d=50 ft
C=50π
Or
C=50×3.14
C=157 ft. Hope it help!

gizmo_the_mogwai [7]3 years ago

3 0

The answer would be 157.07, with a radius of 25

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First step: I'm going to solve our substitution for y:

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$ux=y$

Second step: Differentiate the substitution:

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Third step: Plug in first and second step into the given equation dy/dx=f(x,y):

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Now I have no idea what your left hand side is suppose to look like but I'm going to keep going here:

Subtract u on both sides:

$u'x=\frac{u+u^2}{3+u^2}-u$

Find a common denominator: Multiply second term on right hand side by $\frac{3+u^2}{3+u^2}$ :

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Combine fractions while also distributing u to terms in ( ):

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Third step: I'm going to separate the variables:

Multiply both sides by the reciprocal of the right hand side fraction.

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Reorder the top a little of left hand side using the commutative property for addition:

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The expression on left hand side almost matches your expression but not quite so something seems a little off.

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