I need help devloping a

  1. why was the cave of lascaux closed to the public in 1963?a the floor of the cave was becoming eroded b colonies of algae and a
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  2. a resturant wants to contribute to good health so it change its recipes it decreases sugar content and adds more fresh fruit
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  3. I need help devloping a procedure: Using several bags filled with different amounts of the same item, take the mass of each and
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    2. HELP asked by HELP
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