How tall is Olympus Mons on Mars in feet?

Olympus Mons is the tallest volcano and shield mountain in the solar system, located on Mars. It measures approximately 69,841 feet tall, which is equivalent to about 21,287 meters. When considering the given options, the closest choice to the actual height is 84,480 feet. This height is significant because it emphasizes the vast geological features present on Mars compared to those on Earth, highlighting not just the size of Olympus Mons, but also showcasing the unique volcanic activity that has shaped the Martian landscape over billions of years. Additionally, knowing the correct height helps contextualize the scale and diversity of planetary formations within our solar system, making it an important fact in planetary geology.