The function given for the height of an object dropped from a 100-meter-tall platform is:

$s(t) = 5f + 100$

However, this function seems unusual since typically, the height function for a dropped object involves time squared (due to the acceleration caused by gravity) and doesn't include a term like $5f$.

Could there be a typo or confusion in the expression? If you meant to have a different function, please provide that. Otherwise, I'll need to know what "f" represents to proceed with solving the problem.

Please clarify, or feel free to upload any related information.