Answer:
8
Step-by-step explanation:
Let
. Then

lies in the second quadrant, so

So we have

and the fourth roots of
are

where
. In particular, they are




Answer:
10
Step-by-step explanation:
The only formula that can be used to describe the sequence is definitely the third one

. So count like that

and so on. You can check others by yourself to check if I'm right or not.
Average time for a 35 year old man to run half a marathon is 9:50:38