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# Maxima and minima 02

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### Maxima and minima 02

1. 1. Answer KeyQ3 1. Find two non-negative numbers whose sum is 9 and so the product of the number and the square of the other number is a maximum. (5 pts) 2. Find the circular cone of maximum volume inscribed in a sphere of radius 10-inches. (10 pts)
2. 2. 3. Build a rectangular pen with three parallel sections using 500 ft of fencing. What dimensions will maximize the total area of the pen? (8 pts)4. A container in shape of a right circular cylinder with no top has a surface area of 130 ft2. What height h and base radius r will maximize the volume of the cylinder? (8 pts)
3. 3. 5. A sheet of cardboard 3 ft by 4 ft will be made into a box by cutting equal sized squares from each corner and folding up the four edges. What will be the dimensions of the box with largest volume? (5 pts)6. Consider a rectangle of perimeter 12-inches. Form a cylinder by revolving this rectangle about one of its edges. What dimensions of the rectangle will result in a cylinder of maximum volume? (10 pts)