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(-1,-2)

Step-by-step explanation:

The vertex of the parabola is the minimum or maximum point of the parabola.  It is located along the line of symmetry.

Looking at the graph, the minimum point is (-1,-2)

80π/3 or about 83.775

step-by-step explanation:

since a cone is 1/3 of a cylinder, we need to find the base's area. since area = πr^2, we get 16π. then, multiplying this by 5, we get 80π. dividing by 3, since the cone's volume is 1/3 of that of a cylinder's, we get 80π/3.

hope this !