Set Up an Equation That Can Be Used to Solve

Multiple Choice

Set up an equation that can be used to solve the problem. Solve the equation and answer the question asked.
-A retired couple has $210,000 to invest to obtain annual income. They want some of it invested in safe certificates of deposit yielding 6%. The rest they want to invest in AA bonds yielding 12% per year. How much
Should they invest in each to realize exactly $21,600 per year?

A) $150,000 at 6%; $60,000 at 12%
B) $160,000 at 12%; $50,000 at 6%
C) $140,000 at 6%; $70,000 at 12%
D) $150,000 at 12%; $60,000 at 6%