write each number in scientific nota

= 2.3455 × 10^5
= 6.6079 × 10^6
= 6 × 10^-3
= 1.2 × 10^-3
= 2 × 10^4
= 7.8 × 10^-4
= 1 × 10^5
= 1 × 10^-1
= 5 × 10^6
= 2.9 × 10^3
= 234
= 0.00106
= 156,700
= 0.0006002
= (cannot be converted into a standard notation without an exponent)