AP Physic

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Hi there I am having so much problems trying to solve this physic problem and I really need help. Please give me a big hint on how to find the amplitude of this problem because i tried using everything i know and i cannot figure it out. This homework problem deals with wave motion.

Here is the problem:
A transverse sinusoidal wave on a string has a period T=43.0ms and travels in the negative x direction with a speed of 30.0 m/s. At t=0, a particle on the string at x=0 has transverse position of 2.00 cm and is traveling with a speed of -3.50 m/s.

a) what is the amplitude of the wave? in meters

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