Ronald invirtio algun dinero al 5% y $500 mas que la otrq cantidad al 7%. El interes total anual devengado fue de $215 (Cuanto i
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From the half life equation, the remaining fraction
where t = total time elapsed and T = Half life
Now, it is given that,
And remaining fraction is
So, substituting these values in the above equation,
Taking log both sides,
Solving, we obtain that,
years