In the equation

, a is the initial amount and b is the growth factor. So our initial amount is 30 and our growth factor is 8.3. Your correct choice for this is A.
The least is 0.015 because it is less than the others due to the fact that it is far away from the decimal point on the right side
The answer is 3x+2 over (x+2) (x-2)
20 pages might take 30 minutes hope that works