School starts at 8:40 am and end at 3:05 pm how long is the school-days

If eh = hg and hg=16, find the diameter of k

41/17 as a decimal rounded to the nearest hundredth

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