Sound waves are emitted from a fishing boat. Some of the sound waves are reflected by fish and detected back at the boat. The shortest time between the sound waves being emitted and detected is 0.26 s. The speed of sound in water is 1500 m/s. A) Calculate the distance between the boat and the nearest fish.

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