I need to khow the answer to this question √(900) ÷ -6 + 2(-1 - 3)^3 - (2 - 5) (with the process please)

The spotter on the ground is standing beneath the safety net. what is his distance from the base of the platform, to the nearest meter? 3 meters, 2 meters, 4 meters, 1 meter?

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

Which expression gives the area of the triangle shown below