Find the value of w, then x. Round to the nearest tenth

Solve for x i'll try to attach the files bc it's not letting me for some reason

Determine the volume of a cylinder bucket if the diameter is 8.5 in. and the height is 11.5 in.

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