What is the average rate of change in f(x) over the interval (4,13)

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%

How far could you drive on 50 gallons of gas

What is the value of x in the equation7x+2y=48 when y=3