Question

in what time will 10,000 amount to 12,100 at 10% per annum compounded annually​

Answer 1

12100 = 10000(1+10/100) ^ t

121/100 = (1+1/10) ^ t

121/100 = (11/10) ^ t

(11/10)^2 = (11/10) ^ t

on comparing the powers

2 = t