What’s the vertex of the parabola in the graph

The height of a flare fired from the deck of a ship in distress can be modeled by h(t)= -2(8t^2-52t-28), where h is the height of the flare above water and t is the time in seconds. a. find the time it takes the flare to hit the water.

Which of the following represents the range of the graph of f(x) below

Which value of m will create a system of parallel lines with no solution? y = mx - 6 8x - 4y = 12