The cruising speed of the bullet train will be at least 150 miles per hour. Use \( s \) to represent the train's cruising speed (in miles per hour).

The history of high-speed rail dates back to Japan's Shinkansen, which began operation in 1964, heralding a new era of transportation that drastically reduced travel times. This revolutionary train system inspired numerous countries worldwide to invest in high-speed rail technology, showcasing the benefits of speed, efficiency, and environmental friendliness in public transport. In terms of real-world applications, the cruising speed of 150 mph for a bullet train allows it to cover significant distances quickly, impacting daily commutes and long-distance travel. For instance, travel times between cities such as Los Angeles and San Francisco could be cut down to just a few hours, making high-speed trains a competitive alternative to air travel while also reducing road congestion and pollution.