Answer:
6,7
Step-by-step explanation:
Since the triangles are congruent your equation would be 2y+8=19
Solve for y
y=5.5
V=(1/3)hπr^2 where h=height and r=radius
given
radius=3
height=2a
r=3
h=2a
v=(1/3)hπr^2
v=(1/3)(2a)π(3)^2
v=(1/3)2aπ9
v=6aπ
so the expression would be some variaant of v=6aπ