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Why do in america they call it a hurricane but in australia a 'cyclone' ? Solve and write interval notation for the solution set. Then Graph the solution set. -1≤x-4<8? Verify the identity: cos^2 theta - sin^2 theta = 2cos^2 theta -1? What is the Schwarzschild radius, in kilometers, of a black hole whose mass is 3.06×10^8 MSun? 4.8 L of a gas at -31C expands to a volume of 22.5 L. What is the resulting temperature at Kelvin?