math
posted by Kayla on .
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?

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.