00000000002.52 is the correct answer
The power of 10 tells you how many places to move the decimal point.
Move the decimal point to the right for a positive power.
Move the decimal point to the left for a negative power.You want to move the decimal point 10 places to the left. First, write extra zeroes in front of the number.
2.52 = 00000000002.52
Now move the decimal point 10 places to the left.
00000000002.52 → 0.000000000252
2.52 × 10–10 = 0.000000000252
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2.52*10^-5 is already in standard form so there is nothing to solve!
10 billion in standard form is 1.0 × 1010
It is 3.25*10^10 in standard form or scientific notation
4.2*10-4 IS in standard form.
Standard form is simply 10-3.
3.26*10^-3 is in standard form!