Chapter 5 - Number Representation and Calculation - Chapter Summary, Review, and Test - Review Exercises - Page 244: 4

$8076 = (8 \times 10^3) +(0 \times 10^2) + (7 \times 10) + (6\times 1)$

Writing the given number in its expanded form gives: $8076 = 8000 + 70 + 6 \\8076=(8 \times 1000) + (0 \times 100) + (7 \times 10) +(6\times 1) \\8076 = (8 \times 10^3) +(0 \times 10^2) + (7 \times 10) + (6\times 1)$