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What is the difference between standard and units in measurements ? (a) If A is the area of a circle with radius r and the circle expands as time passes, find dA/dt
in terms of dr/dt.? What is the Schwarzschild radius, in kilometers, of a black hole whose mass is 3.06×10^8 MSun? Physics
A circular disc has total charge -Q and radius R. You may ignore any thickness the disc has.? Solve and write interval notation for the solution set. Then Graph the solution set. -1≤x-4<8?