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Which continent is the longest north to south ? A cylinder's volume is given by (πx^3+4πx^2-3πx-18π cm^3). If the radius of the cylinder is (x+3) cm, what is the height in terms of x? ? How many grams of fluorine gas occupy 543.2 mL and exert 123456 Pa of pressure at 29.8 degrees Celsius? Give answer to 3 s.f.? If a planet has a day that is 20 hours long and each hour is 40 minutes long, how many hours is that in Earth hours? How to choose a domain name?