The population of a city increases in size by 20 percent every 8 years.

• By what percentage will the population have increased after 27 years? (Give your answer correct to at least two decimal places.)
• By what percentage does the growth rate of the city increase over a 8 year period? (Give your answer correct to at least two decimal places.)
• At what rate would the be population growing when there are nine hundred thousand people living in the city? (Give your answer correct to the nearest integer.)
• At what rate will the population be growing 3 years later? (Give your answer correct to the nearest integer.)