A total of $20,000 was invested in two certificates of deposit at simple annual interest rates of 6 percent and 9 percent, respectively. If the total interest on the two certificates was $1,440 at the end of one year, what fractional part of the $20.000 was invested at the higher rate?	Answers:
A) 11/20
B) 2/5
C) 1/2
D) 3/5
E) 3/4
x * 6/100 * 1 + (20000 - x) * 9/100 * 1 = 1440   6x - 8x = 144000 - 180000   =&gt; -2x = -18000   =&gt; x = 9000   So 11000/20000 = 11/20   11/20nswer - 11/20
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A total of $20,000 was invested in two certificates of deposit at simple annual interest rates of 6 percent and 9 percent, respectively. If the total interest on the two certificates was $1,440 at the end of one year, what fractional part of the $20.000 was invested at the higher rate?