How do i solve it. i am having trouble getting the answer

What is the order of magnitude for the number of liters in a large bottle of soda served at a party

Which point is a solution to y s 4x + 5?

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