Round 15.27 to the nearest tenth

For the following geometric sequence, find the recursive formula. {-80, 20, -5, } i need : ')

He mass of a single atom of carbon can be found by dividing the atomic mass (12.01 g) by 6.022 x 10^23. which is the mass of a single carbon atom, correctly written in scientific notation with the correct number of significant figures?

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