Yen had 19 songs on his mp3 player. he downloaded 9 more songs today, and then he decided to split them all equally among 4 playlists. how many songs does yen put in each playlist?

Sally deposited money into a savings account paying 4% simple interest per year. the first year, she earned $75 in interest. how much interest will she earn during the following year? show your work and explain your reasoning in the space provided below.