1.2 (II) If ((1*1) + (2*2) + (3*3) + ... + (10*10)) = a, then what is the value of ((2*2)+(4*4) +(6*6) + ... +(20*20)) in terms of a?​

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%