Where is the epicenter (it's about earthquakes)

Picture a all traveling at a constant speed around the inside of a circular structure. is the ball accelerating? explain your answer

At very high pressures, gases become and will eventually a) more dense; become hotter b) more dense; change to a liquid or solid c) less dense; combust d) less dense; turn into a liquid

Atruck driver is attempting to deliver some furniture. first, he travels 8 km east, and then he turns around and travels 3 km west. finally, he turns again and travels 13 km to his destination. what is the drivers distance