Use the proportion equation. Cross multiply. Answer is 10.4%
N + d = 30
0.05n + 0.10d = 2.20
^^ ur system of equations
The answer to the question is 20.55
One million = 1,000,000
So Three million is 3,000,000
One thousandths is 0.001
So nine thousandths is 0.009
So three million and nine thousandths is 3,000,000.009