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HELP PLEASE‼️

The formula l=Prt can be used to find the amount of simple interest earned on a principal amount p, after t years with annual interest rate r.

For how many years has an account been earning simple interest if $50.40 was earned on a principal amount of $420 with an annual interest rate of 4%?

Respuesta :

camb2016
16.8 years? sorry if this is wrong. I just divided 4% by the principal amount.

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