Answer
$\$50,000$ at $1.5\%$ and $\$90,000$ at $4\%$.
Work Step by Step
Step 1. After paying tax, she got $200,000\times0.7=140,000$
Step 2. Assume $x$ amount at $1.5\%$, thus the amount at $4\%$ would be $140,000-x$
Step 3. The total annual interest can be found as $0.015x+0.04(140,000-x)=4350$
Step 4. Solve the equation: $0.015x-0.04x+5600=4350$ or $0.025x=1250$, thus $x=50,000$
Step 5. Conclusion: investments $\$50,000$ at $1.5\%$ and $\$90,000$ at $4\%$.
