Answer:
d(5) = 5
Step-by-step explanation:
The nth term is given by :
...(1)
We need to find the 5th term of the above sequence. For this, put n = 5 in the above formula.

So, the 5th term in the above sequence is 5.
I used geogebra for this. I hope this helps
Maybe 50 because if 5+5 pages is 40 minutes you would add another page which would be maybe 50 minutes