Question

Is my answer correct? The population of a city is 160,000 and is increasing at a rate of 1.5% each year. Approximately when will the population reach 320,000? My answer is approximately 46 years. Is that right? Thx

Answer 1

320,000 = 160,000 (1.015)^n

2 = 1.015^n
log 2 = n log (1.015)
n = .301/.00647 = 46.5 years