IDNLearn.com: Your trusted platform for finding precise and reliable answers. Ask anything and receive comprehensive, well-informed responses from our dedicated team of experts.
Answer: 0.9
Explanation:
If frequency equals the amount of oscillations in one second then 20/18 = f = 1.11 and to find period (T) then we use the equation T= 1/f or in this case 1/1.11 = 0.9