- What would happen if I pointed at a star?

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Brackets confuse me on indices. How do you find (-5)^2
(5)^2
and (-5)^-2 and (5)^-2? Should Obama lead a compound state comprising of America, Canada, Britain, Australia, and New Zealand? What is formula to find the magnitude of the force of gravity between two 1.1 kg flower pots if their separation is 1.9 m ? Can a perfect square ever be twice as large as another perfect square? How can we use Nonlinear Regression curves
to describe the relationship between two variables?

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