What are the coordinates of the endpoints of segment M’N’?

What is the value with a place of tenths in 907.456 1) 0 2) 6 3) 4 4) 5

Aladder that is 20ft long is leaning against the side of a building. if the angle formed between the ladder and the ground is 75 degrees how far is the bottom of the from the base of the building?

Iknow the answer but the calculator doesn't seem to give the right one