What power does this expression simplify to [ ( 7 ^5 ) ( 7 ^3 ) ] ^ -4

In the diagram, the ratio of ab to ae is (1/2) . what is the ratio of the length of to the length of ?

This is so hard and it’s for a test

Asquare has a side that measures 11 units. what is the area of a circle with a circumference that equals the perimeter of the square? use 3.14 for π, and round your answer to the nearest hundredth. 1519.76 units2 379.94 units2 616.56 units2 154.14 units2