Valerie and her parents are going to her grandparents' house in Tennessee. It is a 3-hour drive. If they leave at 9:00 am and don't make any stops, what time will they be at Valerie's grandparents' house?

Expresa commuter train leaves downtown sation and travels at a average speed of 55 miles per hour towards the north side sation, which is 50miles away. thirty minutes later, express commuter train #7 leaves north side and travels at a average speed of 35miles per hour towards downtown sation. at the moment the two trains pass each other, how far(in miles) is train #12 from the downtown sation and how long(in minutes) has the #12 train been traveling