0.8 = 8.0 × 10-1
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185000000 in scientific notation is 1.85 x 10^8. This is because you move the decimal point 8 places to the left to make the number between 1 and 10, and then multiply by 10 raised to the number of places you moved the decimal.
To write 150,000,000 in scientific notation, you move the decimal point 8 places to the left, resulting in 1.5 x 10^8.
Note that the number is same as 800,000,000.0. Therefore, move 8 decimal places left from the starting point, and 800,000,000 in Scientific Notation is 8 x 108.
8 = 8.0 × 1008 x 10^0
1.68 x 10^8 = 168,000,000