Question

anwer fast to be brainlist​

Answer 1

Answer:

solve your self

Explanation:

don't ask questions

Answer 2

Answer:

$frequency = \frac{no \: of \: oscillations}{total \: time} \\ = \frac{80}{8} \\ = 10$

$time \: period = \frac{1}{frequency} = \frac{1}{10} \\ = 0.1$

Hope it helps please mark me as brainliest