What expression would give the number of ways to choose a group of 7 from a group of 15?

What’s the domain of this function? fastttt

Which of the symbols correctly relates the two numbers below check all that apply 6? 6

Aman is 6 feet 3 inches tall. the top of his shadow touches a fire hydrant that is 13 feet 6 inches away. what is the angle of elevation from the base of the fire hydrant to the top of the man's head?