Answer: [tex]12.98 Hz[/tex]
Explanation:
The frequency [tex]f[/tex] of a wave is given by the following equation:
[tex]f=\frac{1}{P}[/tex]
Where:
[tex]P=0.077 s[/tex] is the period
Hence:
[tex]f=\frac{1}{0.077 s}[/tex]
[tex]f=12.98 s^{-1}=12.98 Hz[/tex]
