Boy Mow Chau's answer to Annela's Secondary 4 A Maths Singapore question.
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This would be the method, but best that you re-check all the calculations :)
Date Posted:
4 years ago
amendment …
in part (iii), note that -80 ln (1/3) = 80 ln(3)
although value will turn out to be the same, write as
t = 80 ln(3) would be better since t cannot be negative.
in part (iii), note that -80 ln (1/3) = 80 ln(3)
although value will turn out to be the same, write as
t = 80 ln(3) would be better since t cannot be negative.
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