25000 at 7% compounded semi anually for 10 years.

Answer 1

3.5 % twice a year, 20 periods

1.035^20 = 1.9898

1.9898*25000 = $ 49,744.72

rough check is 7% for ten years compounded is about double your money

Answer 2

That by the way is NOT simple interest. It is compound interest.