I think this is multiple choice, and if it is, your answer is Don't do it yourself
B is ur best choice !!!!...
The answer is
M= log (Xy/zpower3)
There really isn’t an answer for your question. Sorry.
Answer:
A. 30:2
Explanation:
After every 30 chest compressions at a rate of 100 to 120 a minute, give 2 breaths.