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another problem for checking - algebra

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P dollars is invested at annual interest rate r for 1 year. If the interest is compounded semiannually, then the polynomial P(q + r/2)^2 represents the value of the investment after 1 year. Rewrite w/o parenthesis and eval if P= $200 and r = 10%

P(1 + r/2)^2
200(1 + r/0.10/2)^2
(200 + r/20)^2

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