# Chapter 3 - Exercises - Page 141: 7a.

$16,000,000$ comparisons $* \frac{1}{12,000}$ seconds/comparison $=1333$ seconds the average time approximates to 22.2 hours.

#### Work Step by Step

The average number of comparisons for a 32 million long list would be 16 million Here is the calculation: $16,000,000$ comparisons $* \frac{1}{12,000}$ seconds/comparison = 1333 seconds the average time approximates to 22.2 hours.

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