Write an expression that gives the requested sum.
The sum of the first 16 terms of the geometric sequence with first term 9 and common ratio 2

The lengths of nails produced in a factory are normally distributed with a mean of 4.91 centimeters and a standard deviation of 0.05 centimeters. find the two lengths that separate the top 4% and the bottom 4%. these lengths could serve as limits used to identify which nails should be rejected. round your answer to the nearest hundredth, if necessary.

Triangle xyz has vertices x(1,3), y(0,0)

Through non-collinear points there is exactly one plane.