What is the equation of a circle centered at the origin with radius 20.. i cant find the answer and i even tried

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)?

Select the margin of error that corresponds to the sample mean that corresponds to each population: a population mean of 25, a standard deviation of 2.5, and margin of error of 5%

What is the 17th term in the arithmetic sequence in which a6 is 101 and a9 is 83