Which of the following statements about content-based filtering is TRUE? A. With content-based filtering, users receive recommendations for items liked by similar users.

B. With content-based filtering, users receive recommendations for items that are similar in type to ones they already like.

C. Both A and B are true

D. Neither A nor Bare true

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.

Explain how email technologies enable the exchange of messages between users. find out the typical parts of an email address and explain each part.

1. which of the following statements are true about routers and routing on the internet. choose two answers. a. protocols ensure that a single path between two computers is established before sending packets over it. b. routers are hierarchical and the "root" router is responsible for communicating to sub-routers the best paths for them to route internet traffic. c. a packet traveling between two computers on the internet may be rerouted many times along the way or even lost or "dropped". d. routers act independently and route packets as they see fit.