The equation of a parabola is given. Determine if the parabola is horizontal or vertical, the way the parabola opens, and the vertex.x = -y2 + 4y - 8
A. horizontal; opens to the left; (- 4, 2)
B. vertical; opens downward; (2, - 4)
C. horizontal; opens to the left; (- 4, -2)
D. vertical; opens downward; (-2, - 4)
Answer: A
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A. 
B. 
C. 
D. 
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cubic feet. What is the length of the rectangle? 
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Solve the problem.Participants in a memorization experiment were able to recall an average of D digits in t minutes, where 
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for 
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Evaluate the integral.
A. 
- 
B. 
- 
C. 
- 
D. - 