A sandbag was thrown downward from a building. The function f(t)=-16t^2-64t+80 shows the height f(t), in feet, of the sandbag after t seconds:

Part A: Factor the function f(t) and use the factors to interpret the meaning of the x-intercept of the function.

Part B: Complete the square of the expression for
f(x) to determine the vertex of the graph of (x). Would this be a maximum or minimum on the graph?

Part C: Use your answer in part B to determine the axis of symmetry for f(x).

Question

A sandbag was thrown downward from a building. The function f(t)=-16t^2-64t+80 shows the height f(t), in feet, of the sandbag after t seconds:


Part A: Factor the function f(t) and use the factors to interpret the meaning of the x-intercept of the function.

Part B: Complete the square of the expression for 
f(x) to determine the vertex of the graph of (x). Would this be a maximum or minimum on the graph?

Part C: Use your answer in part B to determine the axis of symmetry for f(x).