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Question: Dutch math book, the volume of a function rotated around an axis.

Question:Dutch math book, the volume of a function rotated around an axis.

The function 110 Maple
circle volume-of-revolution plotting
November 24 2021
1

Hello, ive got another question. Im in the last chapter of this book, and i hope i can finish the book this month. So i can start with part 2 of the series of applied math for higher job education. The first book is basically the freshmans year worth of math, and im completing it within 2 months. So im happy with that. :) 

Okey here is the question: 
a.
Draw half a circle x^2+y^2=4, with y >= (bigger or equal to) 0. 

So how do i make half a circle instead of the whole circle? 

The rest of the text says:
b.
Which body is created if the area bordered by the x-axis and this half circle is revolved around the x-axis?
c.
Calculate the volume of this body. 

Greetings,

The Function

> 

smartplot(x^2+y^2 = 4)

 
> 

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