An object is attached to a coil spring, the object is propelled downwards fromits rest prosition at time t = 0. Write an equation for the distance of the object from its rest position after t seconds.

0 inches = distance from rest, Amplitude = 3 in, Period = 1.5 secs

I'm having problems with solving for the B in this problem because of the decimal, i was wondering how to go about doing this.