Respuesta :
In 15 days he would have downloaded 45 songs. In 40 days he would have downloaded 120 songs.
He will have 45 songs on Day 15 and 120 songs on Day 40.
Multiply 3 and 15 to get 45.
Multiply 3 and 40 to get 120
Multiply 3 and 15 to get 45.
Multiply 3 and 40 to get 120