Carry out the following operations and express the answer


Carry out the following operations, and express the answer with the appropriate number of significant figures.

a) 320.5 - (6104.5/2.3)
b) [(285.3 x 10^5) - (1200 x 10^3)] x 2.8954
c) (0.0045x20,000.0) + (2813 x 12)
d) 863x [1255 - (3.45x108)]

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Chemistry: Carry out the following operations and express the answer
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