Answer:
hello. I would love to answer but can you please show me the photo. if yes i will answer.
Step-by-step explanation:
Answer:
40 different arrangements of songs
Step-by-step explanation:
Let

be the length of the hypotenuse in the right triangle

, with

for

, the angle opposite the hypotenuse.
By the law of cosines,

But

, so we end up with

.