Janelle is creating a playlist for the background music during her birthday party. She is going to use special mix songs that are all 12 minutes long. If she wants to play music for 4 hours straight, how many songs will she have to play? A. 12 songs
B. 48 songs
C. 15 songs
D. 20 songs

Astudent must have an average on five test that is greater than it equal to 80% but less than 90% to receive a final grade of b. devon's greades on the first four test were 78% 62% 91% and 80% what range if grades on the fifth test would give him a b in the course? ( assuming the highest grade is 100%)