The stadium lights on the football field cast of 30 feet shadow at the same time Coach fireman who is 6.1 feet tall cast a shadow that is 2.7 feet use similar triangles to determine the height of the stadium lights

What’s the domain of this function? fast

Any is very appreciated! (picture is provided below)not sure how to do this at all won't lie

Me solve this problem, and someone clearly explain to me how to solve it.1.) use the value of the discriminant to determine if the given trinomials has 2 real solutions, 1 real solution, or no real solutions. a.  x2  − 4x  − 7 = 0b. 4r2  + 11r  − 3 = 0c. 3m2  + 7 = 0d.  t2  + 2t  + 1 = 0