A=3,b=6, and c=4 Would you use law of sines, law of cosines, or SOH-CAH-TOA to solve the following triangles

10 ! a train starts from grand city and travels toward belleville 388 miles away. at the same time, a train starts from belleville and runs at the rate of 47 miles per hour toward grand city. they pass each other 4 hours later. find the rate of the train from grand city.

How do i simply this expression (quadratic formula basis) on a ti-84 or normal calculator?

You're locked out of your house. the only open window is on the second floor, 25 feet above the ground. there are bushes along the edge of the house, so you will need to place the ladder 10 feet from the house. what length ladder do you need to reach the window?