Practical application of Quadratic Equations
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1) A business invests $10,000.00 in a savings account for 2 years, At the beginning of the second year, an additional $3500.00 is invested, At the end of the second year, the account balance is $15,569.75. What is the annual interest rate?
2) Rita rows 12km upstream and 12km downstream in 3 hours, The speed of her boat in still water is 9km/hr. Find the speed of the stream?
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The expert examines practical applications of quadratic equations.
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1) At the beginning of the second year: (10,000 + 10,000 x + 3,500)
At the end of the second year: (10,000 + 10,000 x + 3,500) + (10,000 + 10,000 x + 3,500) x = 15,569.75
10,000 + 10,000 x + ...
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