Find the focus and directrix of the parabola.x2 = 28y
A. (0, -7); x = - 7
B. (7, 0); x = 7
C. (7, 0); y = 7
D. (0, 7); y = -7
Answer: D
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A. 
B. 
C. 
D. 
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Find a quadratic function to model the data. Use the model to determine when the ball reaches its maximum height, as well as the value of the maximum height.
A. The ball never reaches a maximum height. B. The ball reaches a maximum height of 40 feet in 1.5 seconds. C. The ball reaches a maximum height of 44.6 feet in 1.6 seconds. D. The ball reaches a maximum height of 50 feet in 2.1 seconds.
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A. 2, 3, 5 B. 2, 3, 5, 10 C. 2, 3, 5, 6 D. 2, 3, 5, 6, 10