A snow blower requires a fuel mixture ratio of 40:1 (gas to oil). Which expression represents this ratio?

In the diagram below, tan θ = sqrt 3. what is the value of m?

What is the volume of the sphere shown below with a radius of 3?

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