Answer: 472,750
Step-by-step explanation:
The population of the city = 310,000
Yearly growing rate = 3.5%
Now find 3.5% of the population = 3.5 x 310,000
----------------------
100
= 10,850.
To find the population increase after 15 years = 10850 x 15
= 162,750
Population in 15 years = 310,000 + 162,750
= 472,750