Acamper attaches a rope from the top of her tent, 4 feet above the ground, to give it more support. if she stakes the rope to the ground 6 feet from the middle of her tent, about how long is the rope from the ground to the tent?

Draw it. It's a right triangle, with a base of 6 feet and a height of 4 feet. Now all you need is Pythagoras' theorem, a^2 + b^2 = c^2.

The height can be a, the base can be b, so all you need is to solve for c, which is the rope.

The rest is left as an exercise to the reader