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. Find the velocity of the mass at time t = 3/4 seconds. Is the mass moving toward or away from its equilibrium position or neither?
A. -12? feet/second; toward from equilibrium position
B. 12? feet/second; away from equilibrium position
C. 0 feet/second; neither
D. 0 feet/second; away from equilibrium position
Answer: C
Mathematics
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Write the equation of a circle with the given center and radius.Center at (0, 9); Radius 
A. (x - 9)2 + y2 = 36 B. (x + 9)2 + y2 = 36 C. x2 + (y + 9)2 = 6 D. x2 + (y - 9)2 = 6
Mathematics
Subtract. Simplify, if possible.7
- 4
A. 2
B. 4
C. -4
D. 3
Mathematics
Completely factor the polynomial.10x3y - 2x2y2 + 30x2y - 6xy2
A. 2x(5x - y)(x + 3y) B. 2xy(5x - y)(x + 3) C. 2xy(5x - 3)(x + y) D. 2xy(5 - y)(x2 + 3)
Mathematics
Use the information given in the figure.
How many are in B and C?
A. 4 B. 56 C. 44 D. 6
Mathematics