11th+grd+7th+Group1

Anthony Garcia Richard Bracy Sultanul Sakib Andy Lam

The correction for problems 1-9


 * 1) Since the formula for density is mass over value the problem is 12.50 divide it by 4.6 and equals 2.717391304. The problem is significant digits. So the rule for significant digits in multiplication and division is that answer has to have the smallest number of significant digits. Since the smallest number has 2 significant digits, the answer will b 2.7g/ml

2.


 * 1) Bronze contains 90 to 95 percent copper and 5 to 10% tin. Because these percentages can vary bronze is classified as… 2 – an element