Insert one set of parentheses in the equation to make it true. Explain your reasoning.

The number of potato chips in a bag is normally distributed with a mean of 71 and a standard deviation of 2. approximately what percent of bags contain between 69 and 73 potato chips? approximately 68% approximately 71% approximately 95% approximately 99.7%

If y varies directly as x2 and y=6 when x=6, find the constant of variation.

Factor the expression using gcf 9b+45