Kyle plans to invest $5000, part at 3% simple interest and the rest at 4% simple interest. What is the most that he can invest at 3% and still be guaranteed at least $180 in interest per year? He can invest at most $
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Let $x$ be the amount invested at 3% simple interest. Since the total investment is $5000, the amount invested at 4% simple interest will be $5000 - x$. Show more…
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