1. The problem asks to identify which decimal number among the given options is nonrepeating. 2. A nonrepeating decimal is a decimal number that does not have any repeating pattern of digits after the decimal point. 3. Let's analyze each option: - $0.625$: This decimal terminates after three digits and does not repeat. - $0.777\ldots$: The ellipsis indicates the digit 7 repeats infinitely, so it is a repeating decimal. - $0.15$ with a bar over the 5 means $0.155555\ldots$, which is repeating. - $\pi$: The decimal expansion of $\pi$ is non-terminating and non-repeating (irrational number). 4. Among these, $0.625$ is a terminating decimal and thus nonrepeating. 5. $\pi$ is also nonrepeating but irrational and non-terminating. 6. Since the question likely expects a decimal number, the best answer is $0.625$. Final answer: $0.625$ is the nonrepeating decimal number.