Two trains are traveling at constant speeds on different tracks. train A- goes 0 to 12.5 all the way to 100 (elapsed time seconds- 1) Train B went 0 thru 100 (elapsed time seconds- 0 to 1 thru 4) Which train is traveling faster? Explain your reasoning.

mile due west of a street intersection. Another car is located 8. mile 4. A police car is at rest and is located north of the intersection and is traveling at a speed of 40 miles per hour (mph) due south toward the intersection. At that instant, the radar in the police car records the rate at which the distance between the two cars is changing. What speed is recorded by the radar? 35.8 mph 38.8 mph 41.2 mph 44.2 mph 53.7 mph 0 0

Plz help and look at pic. Thanks

A car is initially located 40 km North of a truck. The car then begins to travel North at 20 km/h, while at the same time, the truck travels due West at 30 km/h. After travelling for 2 hours , the distance between the two vehicles is 11. A. decreasing at 26 km/h B. increasing at 26 km/h C. decreasing at 34 km/h D. increasing at 34 km/h