Question

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Answer 1

$\text{Hey there!}$

$\text{If 12 waves pass a point in 4 seconds, the frequency of vibration is:}$

$\text{In order for you to find out the frequency of vibration, you have to\underline{ DIVIDE} 12 from 4}$

$\frac{12}{4}\ = \frac{12\div4}{4\div4}\ = 12\div4=3 \ \rightarrow4\div4=1$

$\text{3}\div\text{1 = 3}$

$\boxed{\boxed{\text{Answer: C.) 3}}}\checkmark$

$\text{Good luck on your assignment and enjoy your day!}$

~$\frak{LoveYourselfFirst:)}$

Answer 2

It would be C bc you do 12/4 so 3 waves per second