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. 0 ft/s; away from equilibrium position
B. -4? ft/s; toward from equilibrium position
C. 0 ft/s; neither
D. 4? ft/s; away from equilibrium position
Answer: C
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Find the center of mass of a thin plate of constant density covering the given region.The region bounded by y = 10 - x and the axes
A. 
= 10, 
= 10
B. 
= 50, 
= 50
C. 
= 
, 
= 
D. 
= 
, 
= 
Solve the problem.A rotating beacon is located 15 ft from a wall. The distance from the beacon to the point on the wall where the beacon is aimed is given by a = 15
,where t is time measured in seconds since the beacon started rotating. Find a for 
Round your answer to the nearest hundredth.
A. 60.32 ft B. -17.12 ft C. 17.12 ft D. 38.72 ft
Provide an appropriate response.Checks that you have written, but are not listed on the bank statement, are called:
A. outstanding B. NSF C. delayed D. in transit
A solution contains 0.2 liters of sulfuric acid. If this represents 8% of the total amount, find the total amount.
A. 3 liters B. 3.5 liters C. 1.5 liters D. 5 liters E. 2.5 liters