7lbs equal how many oz?

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%

Ined this is due tomorrow and i dont know the answer can you find all the exponents

What are the first 4 terms in the multiplication pattern given by the formula 2×4n