120 yards long in total (100-yard playing field plus two 10-yard end zones).
There isn’t a fixed number; it varies by length and purpose. A common short essay has three paragraphs (intro, body, conclusion).
Area = ½ × base × height; multiply the base by the height (perpendicular to the base).
128 US fluid ounces in a US gallon; 160 Imperial (UK) fluid ounces in an Imperial gallon.