1. The problem statement, all variables and given/known data An object is undergoing simple harmonic motion with frequency = 3.2 Hz and amplitude = 0.12 m. At = 0 the object is at = 0. How long does it take the object to go from = 0 to = 7.2×10−2 m? 2. Relevant equations 3. The attempt at a solution s(t)=Asin(ωt) A=amplitude=.12 m ω=2πf=2π*3.2=20.1 t=undefined s(t)=.12sin(20.1) 7.2*10^-2=.12sin(20.1t) divide out the .12 .6=sin(20.1t) Take the inverse sin of both sides arcsin.6=20.1t The inverse of sin cancels out sin on the right so 20.1t is left. 36.87=20.1t Divide out 47.75 to get t. t=1.8338 seconds They want the answer in two figs, I put 1.8, and they marked it wrong are my steps wrong?