Images are used for supervised AI training. "Select all crosswalks" is used to help their AI to identify crosswalks, likely quality assurance for some driving algorithm. They detect you as human because the mouse takes a path that is recognized as human (doesn't jump directly to image position, has arc, has varied response time, etc.), not because you made the right selection.

So congrats, you work for Google.

"Since money towards principal reduces the balance, the interest payments are front loaded (more money towards interest early in the loan and less at the end). Amoritization calculaters visualize this effect."

Firat sentence was an incomplete thought; APY is calculated for the term of the loan an figured into a normalized payment amount. Else you said the same thing.

APY is calculated over the term of thw loan. Since money towards principal reduces the balance, the interest payments are front loaded (more money towards interest early in the loan and less at the end). Amoritization calculaters visualize this effect.

They use piano hinges normally... some have a step to allow a deeper material to recess. Searching "mailbox hinge" on the jungle website produced relevant results.

To snap into place, maybe you're referring to a "ball catch" type mechanism.