Write a function that calculates the ratio between the sum of the prime numbers lower or equal than x, and the sum of the non-prime numbers lower than x.
Arrange Vector in descending order
Matlab Basics - Convert a row vector to a column vector
Divide by 4
Calculate volume of box
Approximate the inverse tangent by power series
Say type of roots in quadratic equation
Get the mean digit
Get the value 100
Double the next!
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