The distance formula is used for 2 points on a coordinate plane?

Which segments are congruent? o jn and ln o jn and nm o in and nk onk and nm

The parabola x = y² - 9 opens: a.)up b.)down c.) right d.)left

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?