Answer:
First Question:
0042=4210000=42104=42⋅1104.
Recall that 1ab=a−b and vice versa,
so we can write 42⋅1104=42⋅10−4 .
The correct option is (D)
Second Question:
6120 is your answer
Take the decimal in 6.12 and move it to the right three times. You should get your answer.
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