I need help asap with my math

8000 + 8800 + 8000 + 8 million + 80 trillion + another a katrillion equals

Set $r$ is a set of rectangles such that (1) only the grid points shown here are used as vertices, (2) all sides are vertical or horizontal and (3) no two rectangles in the set are congruent. if $r$ contains the maximum possible number of rectangles given these conditions, what fraction of the rectangles in set $r$ are squares? express your answer as a common fraction.

What is the perimeter of an isosceles triangle with each leg measuring 2x+3 and the base measuring 6x-2?