30 is 60% of what number

Which of the fallowing best completes the sequence 5,10,15, a) 30 b) 22 c)25 d)35

Negative 5 1/12 + negative 4 1/4 + 6 3/4

The number of branches on a tree demonstrates the fibonacci sequence. how many branches would there be on the next two levels of this tree? 13 | | | m branches