A numerical pass code is required to open a car door. The pass code is five digits long and uses the digits 0–9. Numbers may be repeated in the pass code. How many different pass codes exist?

Each of the five positions can contain any of the 10 digits, 0 through 9. Because digits may repeat, the choices for each position are independent, giving 10 × 10 × 10 × 10 × 10 = 100,000 pass codes. Therefore, the correct choice is D, 100,000.

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