Answer:
4.1145
Step-by-step explanation:
You can use the following formula to solve this kind of problems,

So, let's start of with log4_(300). Since the question have already gave log4_(3) =0.7925 and log4_(5) =1.1610. It means that you have to split the 300 into the simplest form where almost all of the numbers are 3 and 5.

It’s A I’m pretty sure it’s right
It is 120 because you have to divide 210 by 7 which is 30 then multiply by 4 so 30 x 4 = 120.