im in desperate in need of help

Answer:
(2.) V = 1,536[tex]\pi[/tex] mm^3; (3.) V = 1,943.9 mm^3
Step-by-step explanation:
The formula for volume of a cylinder is V = [tex]\pi r^{2}h[/tex]
For Problem 2, we have V = [tex]\pi * 8^{2} * 24[/tex]
V = 1,536[tex]\pi[/tex] mm^3
For Problem 3, we have V = [tex]\pi[/tex] * [tex](\frac{15}{2})^{2}[/tex] * 11
V = 1,943.86 = 1,943.9 mm^3