im not sure...
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720080 = 700000 + 20000 + 80 or 7.2008 x 10^5
ANSWER: 380019% of 20000= 19% * 20000= 0.19 * 20000= 3800
3.75% of 20000 = 20000*3.75/100 = 750
400000000
you do not do anything when you add numbers with exponents. you just figure out the answer. it is only if you multiply numbers with exponents, where you add the exponents..