- Before we discovered what stars really are, what were other ideas?

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Does anyone else find thunder and lightning storms relaxing? 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? Simplify. Assume no radicals were formed by raising negative quantities to even powers. 1) 2√32 2) -4√18? How do you evaluate the following ||3.99||?