Question

How did percy survive the fall from arch?

Answer 1

The Gateway Arch (also known as the St. Louis Arch) is a national monument in Missouri, USA. The nation’s tallest monument at 630 feet, the Gateway Arch has beckoned visitors for more than 40 years with its iconic, awe-inspiring shape. The vision of renowned architect Eero Saarinen, the Gateway Arch commemorates Thomas Jefferson and St. Louis’ role in the westward expansion of the United States of America.

Step-by-step explanation:

Answer 2

It's been a year since my class read Percy Jackson so I'm not entirely sure of this helps.
But being half-god (especially being offspring of Poseidon), I'd say it's safe to assume he would easily survive a fall into the river, even at that height. Unless we're talking about two different books entirely, in which case.. I got nothing haha