Simplify: The question in photo ​

The appalachian trail is a hiking trail that passes through the appalachian mountains. three members of a teen hiking group hiked a section of the trail. the hikers stopped at a rest area and equally shared 3 4 gallon of water. how much water did each person get?

The area of square garden is 300m squared. how long is the diagonal?

Find the roots of the polynomial function f(x) = x^3 + 2x^2 + x