SOLUTION: when the population growth of a certain city was first studied, the population was 22000. It was found that the population P grows with respect to time t in years by the formula:

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Question 1052641: when the population growth of a certain city was first studied, the population was 22000. It was found that the population P grows with respect to time t in years by the formula:
P=22000 (10 ^0.163t)
a.) How long will it take for the city to double its population?
b.) How long will it take for the population of the city to triple?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
P%280%29=22000
So then,
a)44000=22000%2810%5E%280.163t%29%29
10%5E%280.163t%29=2
0.163t%29=log%28%282%29%29
t=log%28%282%29%29%2F0.163
and similarly
b)t=log%28%283%29%29%2F0.163