Answer: 0.22hz
Step-by-step explanation:
Hi to answer this question we have to analyze the information given:
So, to calculate the frequency of the pendulum we have to apply the formula;
Frequency (f)= 1 / period
Replacing with the value given:
f = 1/ 4.5 sec = 0.22 hz
Feel free to ask for more if needed or if you did not understand something.
Pi was discovered way back already the way to Babylonians and Egyptians 216 BC but none were all the way accurate they were close
Answer: graphing