The earth is about 150 million kilometers from the sun. the orbit around the sun is not a perfect circle, but is approximately a circle. if the orbit of the earth around the sun were circular, what would be the equation if the origin of the coordinate system were placed at the sun? x² + y² = (150,000,000)² x² - y² = (150,000,000)² x²y² = (150,000,000)²

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.