Barbata invests $1400 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? Pick:
A) 700 B) 300 C) 1000 D) 360 E) 2400
Let the additional invested amount for 8% interest be x;   Equation will be;   1400+0.05*2400+x+0.08x = 1400+x+0.06(2400+x)   0.05*1400+0.08x = 0.06x+0.06*1400   0.02x = 1400(0.06-0.05)   x = 1400*0.01/0.02= 
<gadget id="calculator">1400*0.01/0.02</gadget>
<output>700</output>
700   700ns:700
<result>A</result>
Barbata invests $1400 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?