This is a geometric series with first term e^3 and common ratio e^-2. The sum of it will be
.. e^3/(1 -e^-2) ≈ 23.229277815766...
Y² + 8y + 15
since 8 and fifteen are positive, that means your factors are going to be positive
(y + )(y + )
What are the factors of 15 that add up to 8?
Total times die rolled =10+6+4+8+6+6=40
Times 3 and 6 appears
Experimental probability
P(3 or 6)
It would go in between 8 and 10 since the scale goes by 2's and 9 is in between 8 and 10. Hope this helps you!