IM is the midsegment of a ABC. If AC is 28 centimeters long, how long is IM?
B
A
С
O
A. 35 centimeters
B. 56 centimeters
C. 14 centimeters
O D. 24 centimeters

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