IB Mathematics Applications and Interpretation Quiz
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GEOMETRY AND TRIGONOMETRY
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A swinging pendulum's displacement from its central position, d cm, is modelled by a damped harmonic motion function d(t) = 15e−0.05t15e^{-0.05t} \cos(4πt4\pi t), where t is the time in seconds.
The amplitude of the pendulum's swing decreases over time. To the nearest hundredth of a second, how long does it take for the amplitude to be halved?
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