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 acceleration of the mass at time t = 3/4 seconds.
A. 3?2 feet/sec2
B. -3? feet/sec2
C. -3?2 feet/sec2
D. 0 feet/sec2
Answer: C
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Solve the inequality and write the solution set in interval notation.
?
?
A. 
B. 
C. 
D. 
E. 
Perform the indicated operations on a calculator. Express the result with the proper accuracy and precision. Assume that all numbers are approximate.6.8 + 0.466 + 32.29
A. 39.56 B. 39.6 C. 39.556 D. 39
Solve the problem.Under standard conditions, molecules of a gas collide billions of times per second. If each molecule has diameter t, the average distance between collisions is given by 
where n, the volume density of the gas, is a constant. Find 
.
A. 
= - 
B. 
= - 
C. 
= 
D. 
= 
Solve the application and answer with a complete sentence.A ball is dropped from a height of 1752 feet. The ball's height above the ground after x seconds is given by 
How high above the ground was the ball 9 seconds after falling?
A. The ball was 1608 feet above the ground. B. The ball was 456 feet above the ground. C. The ball was 1464 feet above the ground. D. The ball was 1671 feet above the ground.