1. The problem statement, all variables and given/known data A person fishing from a pier observes that four crests pass by in 7.35 s and estimates the distance between two successive crests as 7 m. The timing starts with first crest and ends with fourth crest. What is the speed of the wave? 2. Relevant equations f = 1/T v = f*d 3. The attempt at a solution T = 7.35s/4 = 1.8375 F = 1/T = 1/1.8375 = .544218 V = .544218 * 7m = 3.81 Can someone tell me what I'm doing wrong? Thanks!