What is the completely factored form of this polynomial? X^4-8x^2+16
O A. (x + 2)2(x - 2)2
O B. (x² - 4)2
OC. (x2 + 4)(x + 2)(x - 2)
OD.(x + 2)(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%