Find the measure of the missing angle

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)?

What is the solution of log2  (3x  -  7)  =  3? 4 5

If a flying disk is 139 meters in the air and travels at an average of 13 m/s how long is it in the air