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In investing $6,950 of a couple's money, a financial planner put some of it into a savings account paying 4% annual simple interest. The rest was invested in a riskier mini-mall development plan paying...

 A computer notebook manufacturer has a daily fixed cost of $10,500 and a marginal cost of $210 per notebook. Y=210x+10,5000. Find the average cost of a computer notebook assuming that...

3. Malin uses a piece of wire 80cm long to form a rectangle. The length of the rectangle is 12cm longer than its breadth. Find the length and the breadth of the rectangle. 4.Nita had $10m. After buying...

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