Question

S-?
y=x² x=3 x=4 y=0

Answer 1

$S = {\int}^{4}_{3} {x}^{2} dx = (\frac{{x}^{3}}{3} + c){|}^{4}_{3} = \\ = \frac{ {4}^{3} }{3} + c - \frac{ {3}^{3} }{3} - c = \\ = \frac{64 - 27}{3} = \frac{37}{3} = 12 \frac{1}{3}$