need help im struggling

Answer:
850.49
Step-by-step explanation:
Volume of a cone: (1/3)*r²*h*π
We are missing the height which we can solve through the pythagorean
(a²+b²=c²)
7²+b²=18²
49+b²=324
b²=275
b=16.5831
Now that we know the height we can solve for hte volume
(1/3)*7²*16.5831*π = 850.49