I need help with this

Logan wants to know how many skateboards have defective parts. he inspects 20,000 skateboards and keeps track of the number of defects per board. use his probability distribution table to find the expected value for defects on a skateboard.

An ant travels at a constant rate of 30cm every 2 minutes. at what speed does the ant travel per minute

Matt had 5 library books. he checked out 1 additional book every week without retuening any books. whats the matching equation