What is 4400 expressed in a scientific notation

Given right triangle xyz, which correctly describes the locations of the sides in relation to

Ivan began dividing g2  – 6 by g + 1, noting that . he started by placing g in the quotient, as shown below. what is g2  – 6 divided by g + 1? g –  1 –  g + 1  – g  –  7 + g  –  5  + 

State if the two triangles are congruent. if they are, state how you know?