Question

Find the area of the surface generated by rotating the graph of f(x)=sqrt(16-x^2) about the x-axis from x = 0 to x =2

Answer 1

@sleepyhead314

Answer 2

same idea as before, do you know how to set it up?

Answer 3

I'll help

Answer 4

one sec.

Answer 5

no she can. she's my hero

Answer 6

.....

Answer 7

now now xD it'll be nice if people could check the work since I'm known for being wrong a lot of the time :P

Answer 8

6pie ughh i think i typed it in wrong

Answer 9

"hero"

Answer 10

i added jess to my refs.

Answer 11

jess i can't reply if you haven't fanned me .-.

Answer 12

format was
2pi times integral from x=(lower number) to x=(higher number) of ( (equation) (sqrt( (derivative of equation)))^2 dx

Answer 13

why do i keep getting 6pie?

Answer 14

http://www.wolframalpha.com/input/?i=2pi+times+integral+from+0+to+2+of+%28sqrt%2816-x^2%29%29sqrt%281%2B%28-x%2Fsqrt%2816-x^2%29%29^2%29%29+dx

Answer 15

<3

Answer 16

@sleepyhead314 I liked the formatting, I messed up on the derivative ;_;

Answer 17

lol xD jeff was the one who gave me the overall equation
I just put it into pluggable terms :P
wolframalpha <3

Answer 18

c;

Answer 19

This is what I got. @tHe_FiZiCx99 @sleepyhead314 http://i.imgur.com/LE8ubM8.jpg

Answer 20

I didn't know you were in Calculus ^

Answer 21

It's a lot that you don't know lol

Answer 22

sleepy is right

Answer 23

and bless her <3

Answer 24

But is it correct, fiz

Answer 25

._. How do you know what I "know"

Answer 26

I don't .-.

Answer 27

the equation for surface area of a rotated area was given to be
http://prntscr.com/3l4hkc

Answer 28

g2g all night

Answer 29

good night :)

Answer 30

<3