Change the given polar coordinates (r, ?) to rectangular coordinates (x, y).(-7, 0)
A. (0, -7)
B. (0, 7)
C. (7, 0)
D. (-7, 0)
Answer: D
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Find the equation of the parabola determined by the given information.Vertex at the origin, focus at (0, 
)
A. y = 
x2
B. x = 
y2
C. y = 
x2
D. y = 28x2
Solve the problem.If a rock is thrown vertically upward from the top of a building 80 feet high with an initial velocity of 64 feet per second, the height, h, above ground level after t seconds is given by h = -16t2 + 64t + 80, where h is in feet and t is in seconds. How many seconds will it take the rock to reach its maximum height?
A. 1 sec B. 5 sec C. 4 sec D. 2 sec
Find the exact value of the following expression without using a calculator.sin 
A. - 
B. - 
C. 
D. 
Identify the graph of the equation as a parabola, circle, ellipse, or hyperbola.x2 + y2 = 16
A. Hyperbola B. Parabola C. Ellipse D. Circle