- #1
Geekchick
- 77
- 0
Homework Statement
x2+y2+16
Homework Equations
[tex]\pi[/tex][tex]\int^{b}_{a}[/tex]{R(x)2}dx
The Attempt at a Solution
I just need to know if i set this up right.
When I solve for y and graph it I get a semi circle that goes from -4 to 4.
[tex]\pi\int^{0}_{-4}[/tex]{([tex]\sqrt{(16-x^{2})}[/tex])[tex]^{2}[/tex]}dx + [tex]\pi\int^{4}_{0}[/tex]{([tex]\sqrt{(16-x^{2})}[/tex])[tex]^{2}[/tex]}dx
I get 85.4[tex]\pi[/tex]