Jackson is on the second floor, which is 18 feet above ground. He then goes down some stairs, defending 5 feet. How many feet above ground is he now?
When he defends 5 feet down, Jackson is now 18 - 5 = <<18-5=13>>13 feet above ground. Answer: \boxed{13}.
Jackson starts on the second floor, which is 18 feet above ground. When he goes down the stairs, he descends 5 feet. To find out how many feet above ground he is now, we subtract the distance he descended from his original height.
18 feet - 5 feet = 13 feet
Jackson is now 13 feet above ground.
To find out how many feet above the ground Jackson is now, we need to subtract the distance he went down from the height of the second floor.
The height of the second floor is given as 18 feet above the ground. Jackson then goes down 5 feet.
To calculate how many feet above the ground he is now, we subtract the distance he went down from the height of the second floor:
Height of the second floor - Distance Jackson went down = Jackson's current height above the ground.
18 feet - 5 feet = 13 feet.
So, Jackson is now 13 feet above the ground.