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Answer:
Let T be the tension in the string
T cos 23 = m g vertical component of T
T sin 23 = m a horizontal component of T
a / g = sin 23 / cos 23 = tan 23
a = g tan 23 = 9.80 m/s^2 * .42 = 4.16 m/s^2
b) is the correct answer
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