Answer: He will need to stop 9 times.
Step-by-step explanation:
3150/320 = (about) 9
The rules are ...


Your expression makes use of both these rules.

Your single logarithm is ...
Answer:
14+6=n=20
Step-by-step explanation:n=20
The answer would be the second one, you can immediately cross off the first one and 3rd one, 2 x 200 = 400 - 300 = 100 :)