Question: 19. Let f ( x ) = x 2 + 14 x + 53. (a) Find the vertex. Answer: ________ (b) State the range of

19. Let f (x) = x2 + 14x + 53.

(a) Find the vertex. Answer: ________

(b) State the range of the function. Answer: ________

(c) On what interval is the function decreasing? Answer: ________

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