If I have 59 mb and I download something which is 25 mb, how much would I have left?

Which of the following “invisible” marks represents an inserted tab?

The forerunner to cell phones, pdas, and smartphones was

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.