7 x 10^4 + 4 x 10^3 + 2 x 10^2 + 7 x 10^1 + 1 x 10^0
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640 written in expanded form using exponents is (6 x 10^2) + (4 x 10^1) + (0 x 10^0)
7049 = 7*19*53
91.4 = (9 x 101) + (1 x 100) . (4/101)
218 = (2 x 102) + (1 x 101) + (8 x 100)
4x10440000