I am not sure if I am right, but this is the best I can answer.
Useing reason, and logic, my guess would be if you take 125, and divided it by 4, you would get 31.25. that should be the answer... if i am wrong, i am truely sorry. I havent been in the subject in a while...
Hope this helps.
Answer:
b =
Step-by-step explanation:
Using the rule of logarithms
log ⇔ nlogx
Given
190 = ( take the natural log ln of both sides )
ln190 = ln = bln200 ( divide both sides by ln200 )
= b