Someone please hurry and help with number 3

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?

Atheater wants to build movable steps that they can use to go on and off the stage. they want the steps to have enough space inside so they can also be used to store props. how much space is inside the steps?

Aquadratic equation in standard from is written ax^2= bx+c, where a,b and c are real numbers and a is not zero?