A few days ago
Can someone help me create a fromula for the Maximum of a Polynomial Function?
A cylinder is generated by rotating a rectangle with perimeter 12 in. about one of its sides.
a. Express the volume of the cylinder as a function of x.
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I’m pretty stumped! I know I’m suppose to create 2 equations out of the knowledge I know but after that I don’t know how to combine them!
Any help is appreciated!
Top 1 Answers
A few days ago
Favorite Answer
Lets let x be the side of the rectangle that becomes the radius of the base of the cylinder, as in the picture:
http://s236.photobucket.com/albums/ff177/jsardi56/?action=view¤t=rotatingrectqngle10-4-07.jpg
Half the perimeter is 6 so the height of the rectangle would be 6 – x, that’s also the height of the cylinder.
The volume of a cylinder is (pi)r^2h so:
V = (pi)x^2(6 – x)
If you want x to be the side that the rectangle is rotating about, the formula would look more like this:
v = (pi)(6 – x)^2(x)
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