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Answer:
30+2+0.8+0.09+0.007
Explanation:
The above is the correct answer, however if you are looking for it is exponential form here is it!
= 3 × 10^1 + 2 × 10^0 + 8 × 10^-1 + 9 × 10^-2 + 7 × 10^-3
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