Question

@DanJS

Answer 1

cN you check my answer? i got 2pi

Answer 2

@DanJS

Answer 3

16/3

Answer 4

pi/2=1.57
3.14
6.28
12.56

Answer 5

@DanJS

Answer 6

um

Answer 7

ok so
f(x) = y = sqrt(4-x^2)

Answer 8

equation of a circle

y^2 + x^2 = 2^2

Answer 9

Centered at the origin and radius 2

Answer 10

and you want the area from 0 to 2

Answer 11

area of a circle is pi*radius ^2

so half is

(1/2)pi*2^2 = 2pi

Answer 12

yeah 2 pi is correct