Solve.A ball is thrown downward with an initial velocity of 35 meters per second from a cliff that is 
high. The height of the ball is given by the quadratic equation 
where h is in meters and t is the time in seconds since the ball was thrown. Find the time it takes the ball to hit the ground. Round your answer to the nearest tenth of a second.
A. 3.7 sec
B. 2.8 sec
C. 2.6 sec
D. 2.7 sec
Answer: D
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Use the fact that the trigonometric functions are periodic to find the exact value of the expression. Do not use a calculator.tan 
A. 1
B. -1
C. 
D. 
Find all solutions of the equation in the interval [0, 2?).(8 cos x - 4)(8 cos x) = 0
A. 
B. 
C. 
D. 
Convert to rectangular coordinates.
A. (-2, 2
)
B. (2, 2
)
C. (-2, -2
)
D. (2, -2
)
Choose a variable to represent one quantity. State what that quantity represents and then express the second quantity in terms of the first.A 54-centimeter piece of rope is cut into two pieces.
A. first piece: z cm; second piece: 54 - 2z cm B. first piece: z cm; second piece: z - 54 cm C. first piece: z cm; second piece: z + 54 cm D. first piece: z cm; second piece: 54 - z cm