Answer:
a) 16

b) Using
is more accurate because it represents the exact and full value of pi, rather than an estimation or approximation like 3.14.
Explanation:
The formula to find the volume of a cone is
. We know the radius is 6, so all we need to find is the height, h. By using the Pythagorean theorem, we can see that the height is
, or 8. Plugging in all the values into the formula gives us:
V =

V = 16

Hope this helped! :)