Kubai saved sh.2000 during the first year of employment. In each subsequent year,he saved 15% more than the preceding year until he retired (a)how much did he saved in the second year (b)how much did he saved in the third year

Answer 1

year 1 --- 2000
year 2 ---- 2000(1.15)
year 3 ---- 2000(1.15)(1.15) = 2000(1.15)^2
..
year n --- 2000(1.15)^(n-1)

to make the question more interesting ...

does he not receive any interest on this investment?