From 0 to 4. ( I don't know how to make the s sign.) [tex] squareroot of (16-x^2)[/tex] I set it equal to y and squared it to get. [tex] y^2 = 16 - x^2[/tex] Then I changed it to: [tex] Y^2 + X^2 = 16[/tex] I know it's a semi circle on the x axis at 0 to 4. What should my final answer be?