Ano ang kahalagahan ng kaalaman sa mga pangunahing posisyon sa braso at paa sa pagtanghal ng mga katutubong sayaw? I need help hihihi '_'

Thank you :)​

During takeoff, the sound intensity level of a jet engine is 170db at a distance of 34 m. what's the sound intensity level at a distance of 1.0 km?

Which changes of state do the labels represent? a: b: c:

Acombination reaction is when two or more combine to form one product. a decomposition reaction is when a substance breaks down into two or more simpler substances in a chemical reaction.