February 19, 2017

Homework Help: Maths

Posted by Sue on Saturday, August 14, 2010 at 6:57am.

Please help!!!
The mass of a particular substance is known to grow exponentially at a rate of 1.5% per day. Its initial mass was 230 grams and, after t days, it weighed 325 grams.
The equation modelling this growth is
230×1.015 t  =  325.
Use the method of taking logs to solve this equation for t, giving your answer correct to the nearest day.

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