I need to know this answer in the next couple of minutes please help I need to show work

Describe the possible echelon forms of the standard matrix for a linear transformation t where t: set of real numbers is onto.

Find all the angles that satisfy the equation cos(θ)=32

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