help me with my maths volume skills peer

Answer:
3591.3
Step-by-step explanation:
[tex]r = \frac{19}{2} \\ \\ vol = \frac{4}{3} \pi {r}^{3} = \frac{4}{3} \times 3.14 \times {( \frac{19}{2} )}^{3} \\ \\ \frac{4}{3} \times 3.14 \times 857.37 = 3591.36[/tex]
Volume:-
[tex]\\ \rm\Rrightarrow \dfrac{4}{3}(pi)(9.5)^3[/tex]
[tex]\\ \rm\Rrightarrow 4/3(/pi)(857.4)[/tex]
[tex]\\ \rm\Rrightarrow 1143.2\pi cm ^3[/tex]