Simple Harmonic Motion: The position of an air-track cart that is oscillating on a spring is given by the equation x = (12.4 cm) cos[(6.35 s-1)t]. At what value of t after t = 0.00 s is the cart first located at x = 8.47 cm?
A. 4.34 s
B. 0.108 s
C. 0.129 s
D. 7.39 s
E. 7.75 s
Answer: C
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