Im sorry but this is not a quotient problem but an addition one, I can still simplyfy it for you though.
answer :
The square root of 5 is 2.23 so it would be closer to 2
There would be 203,759 total registered doctors that year.
Vertical stretch of 4 and shift of 4 to the right is: g(x) = 4*f(x-4)
So: g(x) = -12(x-4)
You are correct.