Ravi has ₹10000 in two accounts paying 5% and 8% annual interest. The total interest is ₹680. Form a matrix equation. What is the value of the determinant D?
Ravi has ₹10000 in two accounts paying 5% and 8% annual interest. The total interest is ₹680. Form a matrix equation. What is the value of the determinant D?
- A. -3
- B. 3
- C. -0.03
- D. 0.03
Answer: C) -0.03
Explanation: Equations: x+y=10000 and 0.05x+0.08y=680. D = |1 1; 0.05 0.08| = 0.08 - 0.05 = 0.03.
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