"Fomyula ya kisayansi"

Translation: Scientific formula

[Cognocto]

Does anyone know why it's kisayansi instead of sayansi?

[AGreatUserName]

It's often done to make an adjective. The meaning here is "related to science".

You could also say Fomyula ya sayansi but that is kind of more like "science formula" or "formula of science".