How are sedimentary rocks changed to metamorphic rocks? Question 3 options:

A through the addition of heat and gravity

B through the addition of heat and oxygenation

C through the addition of heat and melting

D through the addition of heat and pressure

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%