Acertain alloy contains 5.25% copper. how much copper is there in a piece weighing 200 pounds?

What are the soultion(s) to the quadratic equation 40- x^2=0

When y’all answer can y’all explain too !

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%