The speed of a wave can be calculated using the equation:
v = λ * f
where: v is the speed of the wave, λ is the wavelength of the wave, and f is the frequency of the wave.
Substituting the given values:
λ = 8.5 cm = 8.5 x 10^-2 m (converting from centimeters to meters) f = 45 Hz
v = (8.5 x 10^-2 m) * (45 Hz)
Simplifying the expression:
v = 3.825 m/s
Therefore, the speed of the wave is approximately 3.825 meters per second.