Only solve 15 please

Why did the ice arena get so hot after the big game (this is math related google it to find the paper

Points a, b, and c form a triangle. complete the statements to prove that the sum of the interior angles of triangle abc is 180

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.