Two trains depart the station traveling in different directions. Their paths are at a 90-degree angle from one another, as shown in the following illustration. Train 1 leaves the station traveling at 50 mph. Train 2 leaves the station one hour later traveling at 75 mph. Assuming that t represents the time that train 1 has been in route, which of the following inequalities can be used to calculate the values of t for which the distance between the trains is greater than or equal to 100 miles?