2.0 × 102 written in regular notation is 200
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To get the power of a number you multiply it by itself the specified number of times. For instance, the power 2 to the power of 3 would be 2 X 2 X 2 w 2 which would be 8. The power of 2 to power of 10 would therefore be 2 X 2 X 2 X 2 X 2 X 2 X 2 X 2 X 2 X 2 which would equal 1024. 10 to the power of 10 would be 10,000,000,000. 1 to the power of 10 would be 1.
1 x 10 to the power of 2 is 1 x 102 or 10 x 10 or 100
(4.1 x 10-2) x (3.8 x 104) = (4.1 x 3.8) x 10-2+4 = 15.58 x 102 = 1,558
(10)3 x (2)2 = 1,000 x 4 = 4,000
2 x 10^1 x 1 x 10^5 = 2 x 10^6