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Use the properties of rational exponents to simplify (8^4/ 10^4)-1/4 - 8^4 is over 10^4 btw and second part is negative 1 divided by 4? How does the magnetic field react to different types of magnets (bar magnets, horseshoe magnets, donut magnet, etc)? Five more than twice a number is -13 . What s the number? Why do we on Earth need all those stars inside the Universe? If 5.99 g of Li3AsO4 reacts with an excess of the other reactant, how many grams of Mg3(AsO4)2 can be formed?