If 100,000 microns = 1 decimeter, and 1,000,000,000 angstroms = 1 decimeter, how...【小站备考】

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If 100,000 microns = 1 decimeter, and 1,000,000,000 angstroms = 1 decimeter, how many angstroms equal 1 micron?

A.0.00001

B.0.0001

C.0.001

D.10000

E.100000

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