Use identities to simplify the expression.
A. sin w
B. 1
C. sin2 w
D. sin w cos w
Answer: C
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Find the focus and directrix of the parabola with the given equation.y2 = -12x
A. focus: (0, -3) directrix: y = 3 B. focus: (-3, 0) directrix: y = 3 C. focus: (3, 0) directrix: x = -3 D. focus: (-3, 0) directrix: x = 3
Solve the problem.If an object is propelled upward from a height of 144 feet at an initial velocity of 128 feet per second, then its height h after t seconds is given by the equation 
After how many seconds does the object hit the ground?
A. 11 sec B. 4.5 sec C. 8.0 sec D. 9 sec
Solve the problem.The profit made when t units are sold, t > 0, is given by 
Determine the number of units to be sold in order for P < 0 (a loss is taken).
A. 14 < t < 17 B. t > 0 C. t < 14 or t > 17 D. t = 14 or t = 17
Simplify.-(-6y)0
A. -y B. -1 C. -6 D. 0