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OpenStudy (anonymous):
a sum of money doubles in 20 years on simple interest .it will get triple at the same rate in
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OpenStudy (perl):
use the equation A = P(1 + rt)
OpenStudy (perl):
2P = P ( 1 + r*20) solve for r 2 = 1 + r*20 1 = r*20 r = 1/20 = .05 Now plug r = .05 into the formula A = P(1 + r*t) , and substitute r = .05, and t = 3 , A = 3P
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