In right triangle abc, ab=6, bc=12, and angle a=90 degrees. what is the value of cot c? a.) radical sign3 b.) radical sign3/3 c.)radical sign3/2 d.) 2radical sign3/3

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