Answer:
[tex]\lambda = 0.299\,m[/tex]
Explanation:
The wavelength of a wave is given by this expression:
[tex]v_{air} = \lambda\cdot f_{osc}[/tex]
[tex]\lambda = \frac{v_{air}}{f_{osc}}[/tex]
[tex]\lambda = \frac{343\,\frac{m}{s} }{1150\,Hz}[/tex]
[tex]\lambda = 0.299\,m[/tex]