Please help I have no idea what I am doing and I have been trying to solve this for the past 30 minutes

Which is the correct excel formula for the 80th percentile of a distribution that is n(475, 33)? =norm.dist(80,475,33,1) =norm.inv(0.80,475,33) =norm.s.inv((80-475)/33)?

The parabola y = x² - 4 opens: a.) up b.) down c.) right d.) left

Given the median qr and trapezoid mnpo what is the value of x?