Amazon, a successful online retailer, manages an extensive customer database that is used to determine which products are suggested to each customer. Some data are collected from the customer; other data are collected from the businesses where purchases are made. Which customer data are typically collected by Amazon itself

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 three software programs for mobile computing?

Match the file formats with the types of multimedia they can store