You want to see if your dog will respond when you open the front door. after many attempts, you found that the dog barked 75% of the time when you opened the door. suppose you open the door 8 times. how many times do you expect your dog to bark?

Apassenger train and a freight train leave san jose at 3pm, traveling in the same direction. the passenger train is going three times as fast as the freight train. at 6pm they are 240 miles apart. how fast is each travelling? explain your answer and show your