Iknow it's either c or d, because i know the equation, but what do i do from there?

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

Which is the graph of this function 3 square root of x plus one if

Edger needs 6 cookies and 2 brownies for every 4 plates how many cookies and brownies does he need for 10 plates