A cheetah can run 103 feet per second. A zebra can run x feet per second. Use the Distributive Property to write and simplify an expression for how much farther the cheetah can run in 10 seconds.

The concept that is useful in carrying out the given operation for this item is the fundamental principle of counting. For this problem, the number of ways in which Selena can choose an audio system for her car is equal to the product of 3, 4, and 2. Thus, the answer to this item is letter A.