Solve the problem.A coin is tossed upward from a balcony 
high with an initial velocity of 
During what interval of time will the coin be at a height of at least 
A. 0 ? t ? 1 (seconds)
B. 4 ? t ? 8 (seconds)
C. 3 ? t ? 4 (seconds)
D. 0 ? t ? 4 (seconds)
Answer: D
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Match the function with the graph.
A. y = ?x? - 5 B. y = ?x - 5? + 1 C. y = ?x - 5? D. y = ?x + 5?
The matrix associated with the solution to a system of linear equations in x, y, and z is given. Write the solution to the system, if it exists.
A. infinitely many solutions of the form x = 2 + 3z, y = 4 + z, z = z B. infinitely many solutions of the form x = 2 - 3z, y = 4 - z, z = z C. infinitely many solutions of the form x = 2 + 3z, y = 4 - z, z = z D. infinitely many solutions of the form x = 2 - 3z, y = 4 + z, z = z
State the period of the function and graph. cos 8x
A. Period 
B. Period 
C. Period 
D. Period 
Use Gauss-Jordan elimination to find the solution. Write the solution as an ordered triple. x - y + 8z = -107 6x + z = 17 3y - 5z = 89
A. (-5, 8, 13) B. (5, -8, -13) C. (-5, -8, 13) D. (5, 8, -13)