Barbata invests $3000 in the National Bank at 5%. How much additional money must she invest at 8% so that the total annual income will be equal to 6% of her entire investment?
Choose the correct choice from the following:
A) 1200 B) 3000 C) 1000 D) 3600 E) 1500
Let the additional invested amount for 8% interest be x;   1500quation will be;   3000+0.05*3000+x+0.08x = 3000+x+0.06(3000+x)   0.05*3000+0.08x = 0.06x+0.06*3000   0.02x = 3000(0.06-0.05)   x = 3000*0.01/0.02= 
<gadget id="calculator">3000*0.01/0.02</gadget>
<output>1_500</output>
1500   Ans: "1500"
<result>E</result>
Barbata invests $3000 in the National Bank at 5%. How much additional money must she invest at 8% so that the total annual income will be equal to 6% of her entire investment?