## Thinking Mathematically (6th Edition)

$8.2 \times 10^{7}$
Move the decimal point 2 places to the left to get 8.20 or 8.2. Then, multiply $10^{2}$ (or increase the power of 10 by 2) to retain the original value. $=8.20 \times 10^{5+2} \\=8.2 \times 10^{7}$