I really need help with this one please I am going to fail ;(

Identify an equation in point slope form for the line perpendicular to y=3x+5 that passes through (4,-1)

What percent of the circle below is shaded?

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%