If the square root of A over square root of B equals x, which statement must be true?

For what values of b will f(x)= logbx be a decreasing function? (16 )

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?

Are the corresponding angles congruent? explain why or why not.