3. In each of the following questions find the volume. State the units of your answer. a Density 1.4g/cm3. mass 5.6g d Mass 420kg, density 140kg/m3
b Mass 4.2g, density 0.7g/cm3 e Mass 16.32g, density 2.4g/cm3
c Density 800kg/m3, mass 4800kg f Density 6904kg/m3, Mass 28306.4kg

Make them both to where they have the denominator of 18that makes 3/2 equal 27/18 and 1/9 equal 2/18so now you have  27/18x+5=2/18subtract 5 from the other sideso now you have 27/18x+2/18-5then subtract 2/18 from 27/18 to get 25/18x=-5then divide 25/18 by -5 and your answer will be  -5/18

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.

I’m not sure about this question