The type of cover letter written in response to a posted job opening

Least square fit to polynomial write a function leastsquarefit3pol that solves a linear system of equations to find a least squares fit of a third order polynomial to an experimental data set given as two row arrays. the function leastsquarefit3pol must explicitly solve a set of linear equations and cannot use polyfit. there should be no restriction on the size of the problem that can be solved.

What are "open-loop" and "closed-loop" systems

Which computer tools allow you to communicate with coworkers, family,and friends