If $x is invested at a constant annually compound interest rate of k percent, what is the ratio of the total amount including interest after 5n years to that after 3n years?  Pick
A) (1+k/100)^2n	B) (1+k)^n	C) (1+kn/100)	D) (1+n/100)^k	E) (1+kn)
Amount after 3n years will be = x ( 1 + k/100)^5n   Amount after 3n years will be = x ( 1 + k/100)^3n   So, required ratio will be -   { x ( 1 + k/100)^5n } / {x ( 1 + k/100)^3n } = (1+k/100)^n   Hence answer will be a. (1+k/100)^2n   (1+k/100)^2n
<result>A</result>
If $x is invested at a constant annually compound interest rate of k percent, what is the ratio of the total amount including interest after 5n years to that after 3n years?