I missed the day where we were taught the formulas for frequency & wavelength, so doing the questions below are a struggle. Please someone explain how . Question 1 (wavelength) : The speed of sound in air at room temperature is 343m/s. The sound wave produced by striking middle C on a piano has a frequency of 256 Hz. A) Calculate the wavelength of this sound B) Calculate the wavelength for the sound produced by high C, one octave higher than middle C, with a frequency of 512 Hz. ^ This one I had no idea how to even start. :$ Question 2 (frequency) : A child swings back and forth on a swing 12 times in 30.0 seconds. Determine the frequency and period of the swinging. ^ This one I did the answer as f/t = 12/30 = .4 so is 0.4 Hz correct?