Answer
The total revenue af the second year is $\$500,000,000$.
Work Step by Step
To find total revenue at the end of the second year, substitute 2 to $x$ to have:
$R(2)=\dfrac{1000(2^2)}{2^2+4}=\dfrac{4000}{8}=500$
Thus, the total revenue at the end of the second year is $\$500$ million.