write 8473 in expanded form using powers of 10
84738000 + 400 + 70 + 3(8 × 1000) + (4 × 100) + (7 × 10) + (3 × 1)(8 × 10³) + (4 × 10²) + (7 × 10¹) + (3 × 10⁰)8.473 × 10³