Solve the problem.The motion of a spring-mass system is described by the equation 
where y is the distance in feet from the equilibrium position and t is time in seconds. If the weight is 18 feet from the ceiling in a state of equilibrium, find the time at which the weight first passes the equilibrium position.
A. 
sec
B. 4 sec
C. 
sec
D. 1 sec
Answer: C
Mathematics
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Compute the unit binormal vector and torsion of the curve. r(t) = 
A. B(t) = 
, ? = 0
B. B(t) = 
, ? = 1
C. B(t) = 
, ? = 0
D. B(t) = 
, ? = 1
Mathematics
Solve the equation. Give a general formula for all the solutions.tan ? = 
A. 
B. 
C. 
D. 
Mathematics
Divide.Divide -12 by 0.06
A. -20 B. -2 C. -0.2 D. -200
Mathematics
Solve the problem.Find the first term of an arithmetic sequence if a49 = 133 and d = 3.
A. -11 B. -8 C. 3 D. -14
Mathematics