Find the x and y components of each the following vectors

Hypothesis. why don’t you know this? i learned this stuff in like 5th grade

The independent variable would be the fertilizer as it is what the dependent variable (the growth of grass) depends on.

Sounds propagates through some kind of medium. usually it's air, but it goes just as well through solid objects like walls, windows etc. a soundwave will compress the (air)molecules in front of it, and if this increased density wave hits your ears, you register it as sound. solid objects like walls are a lot denser than air, this means that they will damp a wave, but also carry it easier.