Scientific notation is of the form a\times 10^{b}. The value of bb tells you how many places and in what direction the decimal point of aa needs to be moved to convert the number to standard notation. If b<0b<0, then you need to move the decimal point to the left. If b>0b>0, you need to move the decimal point to the right.

For \(\displaystyle{2}×{10}^{{−{4}}}\), we have b=−4. Since −4

\(\displaystyle{2}\times{10}^{{−{4}}}={0.0002}-{4}{p}{l}{a}{c}{e}{s}\)

Therefore \(\displaystyle{2}\times{10}^{{−{4}}}={0.0002}\)

For \(\displaystyle{2}×{10}^{{−{4}}}\), we have b=−4. Since −4

\(\displaystyle{2}\times{10}^{{−{4}}}={0.0002}-{4}{p}{l}{a}{c}{e}{s}\)

Therefore \(\displaystyle{2}\times{10}^{{−{4}}}={0.0002}\)