Question

HELP WITH FLVS ALGEBRA 1

Answer 1

A sandbag was thrown downward from a building. The function f(t) = -16t2 - 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. (4 points)

Part B: Complete the square of the expression for f(x) to determine the vertex of the graph of f(x). Would this be a maximum or minimum on the graph? (4 points)

Part C: Use your answer in part B to determine the axis of symmetry for f(x)? (2 points)

Answer 2

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Answer 3

(A)
−16(t−1)(t+5)


So f(t)=0 when t = -5 or t= -1

Interpretation "The sandbag hits the ground after 1 second."

(B)
144−16(t+2)^2


The vertex is at (-144,-2). It is a maximum.

(C) Using part (B) we know the axis of symmetry is the line x =-2.

Answer 4

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