Question 1
Mr. An deposits money in a bank with compound interest $T_n=A(1+r)^n$, where $A$ is the initial principal, $r$ the interest rate per period, $n$ the number of periods, and $T_n$ the principal plus interest after $n$ periods. He deposits 100 million VND at 6.5% per year and does not withdraw principal or interest. After how many years will he receive at least 250 million VND?
The following source mathematical images preserve the printed option/formula/figure variants; text and choices above or below provide clean typesetting.
The supplied key prints correct-answer weights of 4 and 6 points. Wrong-answer and blank-answer scoring are not stated; no penalties or blank credit are inferred.
The following source mathematical images preserve the printed option/formula/figure variants; text and choices above or below provide clean typesetting.
The supplied key prints correct-answer weights of 4 and 6 points. Wrong-answer and blank-answer scoring are not stated; no penalties or blank credit are inferred.