<PRE><B>Question 1015219</B>
National Bank advertises an interest rate (in decimal form) of 0.15. If your initial investment is $300 and you want to accumulate $300 in interest, how many years do you need to invest? 
I = Prt 
Without substitution, solve the formula for the unknown variable in terms of the known variables. 
300 = 300*0.15*t
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t = 1/0.15
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time = 6 2/3 years
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Cheers,
Stan H.
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