Which statements describe the function f(x) = 3(1/3)^x? Check all that apply.

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

On ryan's last social studies test there were two types of questions true/false worth 3 points each and multiple choice questions worth 4 points each

The area of each triangle is 7 square units. the surface area of the triangular prism is