Homework Help: math

Posted by Kayla on Monday, September 20, 2010 at 4:45pm.

Pretend the program in Senegal had been reducing infant mortality at a rate
of 11 % per year. How long would it take for infant mortality
to be reduced by 35 %? How do I go about solving this problem?

math - bobpursley, Monday, September 20, 2010 at 5:00pm
when it is reduced by 35%, the remaining not dead is .65 (65%).

.65=1/(1.11)^t solve for t. How? I would use logs.

log of each side.
log.65=-tlog1.11
t= - (log.65/log1.11) Use your calculator to find the right side.

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