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400 x 109 = 400,000,000,000
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9.45 x 10-9 in standard notation is 0.00000000945
It is: 4.57*10^9 in scientific notation
It is: 5.3*10^9
The standard number 0.09 in scientific notation is: 9 × 10-2
It is 9*10^-2