Help me please this is timed I need help

This is so harddd! solve. 1 + 1 = solve 4 + 4 = solve 3 x 3

The longer leg of a 30° 60° 90° triangle is 16 times square root of three how long is a shorter leg

7. the area of the playing surface at the olympic stadium in beijing isof a hectare. what area will it occupy on a plan drawn to a scaleof 1: 500?