Which equation has exactly ONE solution? A) 3 + 4x 2 = 2x + 1 B) 6 − 2x 2 = 15 + 2x C) 12x − 10 4 = 3x + 4 D) 4x − 20 4 = x − 5

He weights of 2-pound bags of best dog food are approximately normally distributed with a given mean  and standard deviation  according to the empirical rule, what percentage of the bags will have weights within 3 standard deviations of the mean? 47.5%68%95%99.7%