Which is better buy, 3 pounds for $8.31 or 5 pounds for 12.95

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.

Ihave trouble finding the nth term of a linear sequence

The amount spent on food and drink by 20 customers is shown below what is the modal amount spent ?