Which choice is correct about angle RWL

What are the measures of ∠a, ∠b, ∠c and ∠d? explain how to find each of the angle measure.

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%

The graph of y x3 is translated so that the point (1. 1) is moved to (1, 4). what is the equation of the new graph?