its 1.3
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1.3, that's it
One and three tenths in decimal form is written as 1.3. This is because the whole number 1 represents one whole unit, and the decimal point separates the whole number from the tenths place value. The digit 3 in the tenths place indicates three tenths, which is equivalent to 0.3 in decimal form. Therefore, 1.3 represents one whole unit and three tenths combined.
3 and nine tenths as a decimal is 3.9
1/10 * 2/10 = 2/100 = 0.02
.003