A pyramid with triangular base is stack on top of a triangular prism. The pyramid shares a triangular base with the prism. The triangular base has a height of 2 and a base length of 4.4. The height of the prism is 5. The height of the pyramid is 3.9.
Which expression represents the volume of the composite figure?

D. 1/2(2)(4.4)(5) + 1/3 (1/2)(2)(4.4)(3.9)

Step-by-step explanation:

Just took it on edge

if the eqn of the parabola is f(x) = (x-4)(x+2), we need to mult. this out to find the coordinates of the vertex.

then f(x) = x^2 + 2x - 4x - 8, and f(x) = x^2 - 2x - 8.

one way in which you can find the vertex is to calculate x = -b / (2a).   here, that comes to

        )

x = = 1.   f(1) = 1^2 - 2(1) - 8 = - 9.   vertex is at (1, -9).

        2(1) 

find another point on the curve:   let x=0, for which y=-8.   then (0, -8) is on the curve.   plot the vertex and this point and draw a smooth parabola thru both.

hope this

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step-by-step explanation: