[tex] 7.89 \times 10^{-6} + 2.35 \times 10^{-8} = [/tex]
To add numbers in scientific notation, you need the exponents of 10 to be the same. We will convert the -8 to -6.
[tex] =7.89 \times 10^{-6} + 2.35 \times 10^{-2} \times 10^{-6} [/tex]
[tex] =7.89 \times 10^{-6} + 2.35 \times 0.01 \times 10^{-6} [/tex]
[tex] =7.89 \times 10^{-6} + 0.0235 \times 10^{-6} [/tex]
[tex] =7.9135 \times 10^{-6} [/tex]
