Vertex & x and y intercepts of f(x)=x^2

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%

Guys i really need or i have to stay late up night

Which of the following represents a function? 50 !