Do you mean: 3.9*10-9 m
If so then it is: 0.0000000039
39
0.00605
2,802,000
8.5*10^3 is equivalent to 8,500
1.05 to the ninth power is 1.551 (rounded)
8.4 x 1021 divided by 4.2 x 1014
39
0.00605
It is: 6695*102 = 669500
2,802,000
3 to the 9th power is 3 is multiply by itself nine times i.e. 39 = 3x3x3x3x3x3x3x3x3 =19683
-2 to the ninth power = -512
8.5*10^3 is equivalent to 8,500
1.05 to the ninth power is 1.551 (rounded)
05213649982
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1.05 to the ninth power = 1.059 = 1.55133