f(x)= ax^2
( 8 | 2 )
f ( x ) = a * 8^2 = 2
a = 1 / 32
f ( x ) = 1/32 * x^2
f ( x ) = radius
A = r^2 * π
A ( x ) = [ 1/32 * x^2 ] ^2 * π
A ( x ) = 1/32 ^{2} * π * x ^{4}
Stammfunktion
S ( x ) = ∫ 1/32 ^{2} * π * x ^{4} dx
S ( x ) = 1/32 ^{2} * π * x ^{5} / 5
S ( x ) = 0.00061 * x ^{5}
V ( x ) = [ S ( x ) ] zwischen 3 und 8
V = 0.00061 * [ 8 ^{5} - 3^{5} ]
V = 19.84 cm^3