exam Maths Puzzle Numerical Ability

i have tryed to help my son and question ft46 was easyer but i cant figure FT47 out what am i missing

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How much money would i have in 25 years if i invested $17,000 in an account that paid 11% interest compounded continously? just need help with this word problem. how do we write out an equation from consecutive odd and even word problems? can you give an example?