Children aged 12,9 and 4years share R500in the same ratio as their ages. How much do the each get​

Volume of a cylinder with a radius of 13 in and height of 30 in

Compare these two waves: the blue and orange waves have the same pitch, but the blue wave is louder. the blue and orange waves have the same volume, but the blue wave has a higher pitch. the orange wave has a higher pitch, but the blue wave is louder. the blue wave has a higher pitch, but the orange wave is louder.

Which of those sequences is a geometric sequence