Aspeed walker covered 4 1/2 mi in 3/4 hour. how far will he walk with the same pace in: 3 hours

The lines shown below are parallel. if the green line has a slope of -1, what is the slope of the red line?

What is the distance between point a and b

Captain umaima has a ship, the h.m.s. khan. the ship is two furlongs from the dread pirate nadia and her merciless band of thieves. the captain has probability 3/7 of hitting the pirate ship. the pirate only has one good eye, so she hits the captain's ship with probability 2/5. if both fire their cannons at the same time, what is the probability that the captain hits the pirate ship, but the pirate misses.