Is y=0.8(2.1)x exponential growth or exponential decay

Answer this question! 30 points and brainliest! only if you know the answer.

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%

To decrease an amount by 16% what single multiplier would you use