exam Maths Puzzle Numerical Ability

Maria deposited $1200 in an account that paid 6 and 1/2 percent interest compounded continuously. How much money did she have in 8 years? (A, = Pe^rt)

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(square root of x + 2)- x = 0
(x+2)^2 -x = 0
(x+2)^1/2^2/1 - x + x = 0 + x^2/1
x + 2 - 2 = x^2/1 - 2
x = x^2/1^1/2 - 2
x - x = x - 2
0 + 2 = x - 2 + 2
2 = x Show that the number is rational by writing it as a quotient of two integers.

3. -1 1/3

Any help with this equation would be GREATLY</b> appreciated.