A weight is oscillating on the end of a spring (see figure). The position of the weight relative to the point of equilibrium is given by , where y is the displacement (in meters) and  tis the time (in seconds). Find the times when the weight is at the point of equilibrium (y= 0) for

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A. 0.05sec, 0.49sec, 0.94sec
B. 0.05sec, 0.05sec, 0.94sec
C. -0.40sec, 0.49sec, 0.94sec
D. -0.40sec, 0.49sec, -0.40sec
E. 0.05sec, -0.40sec, 0.94sec

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Answer: A

Mathematics

The graph of the given function is drawn with a solid line. The graph of a function, g(x), transformed from this one is drawn with a dashed line. Find a formula for g(x).f(x) = 

A. g(x) =  
B. g(x) = 
C. g(x) = 2
D. g(x) =  + 2

Find the effective rate of interest.9% compounded continuously

A. 9.451% B. 9.374% C. 9.089% D. 9.417%

Solve the problem.The number of students in a school in year n is estimated by the model. About how many students are in the school in each of the first three years?

A. 102, 134, 178 B. 102, 134, 160 C. 116, 148, 192 D. 108, 134, 178

Solve the problem.In an economics study, three quantities m, p, and q have been found to be related by the equation m = p1/2 ? q1/2. Find m, if p = 16 and q = 9.

A. 7 B. 36 C. 12 D. 144