Achocolate factory produces mints that weigh 10 grams apiece. the standard deviation of the weight of a box of 10 mints is 3 grams. you buy a box of mints that weighs 95 grams. what is your confidence that the box you bought did not come from the factory?
a 90%
b 95%
c 10%
d 5%

Add, subtract, multiply, or divide as indicated. list any restrictions for the variable(s) and simplify the answers when possible. 1) x-2 / x+5 + 3x / 2x-1 2) x+6 / x-6 - x^2 / x+6 3) x+9 / x-4 + x+2 / x^2-11x+28 4) x / x^2-64 + 11 / 2x^2+11x-40 5) 5 / x + 11 / x-3 - x-4 / x^2+2x-15