Homework Help: calculus

Posted by rene on Wednesday, September 15, 2010 at 7:00pm.

A program in Senegal has been reducing infant mortality at a rate
of 11.1% per year. How long will it take for infant mortality
to be reduced by 33%?

calculus - Reiny, Wednesday, September 15, 2010 at 7:11pm
solve
.67 = 1(.889)^n
ln .67 = ln (.889^n)
ln .67 = n ln (.889)
n = ln .67/ln .889 = 3.4 years
calculus - rene, Thursday, September 16, 2010 at 4:30pm
thank you!

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