Answer:
He can arange the candles in 720 ways
Explanation:
When we want to arrange n elements into n positions, we use the arrengment formula to solve this questions.
Arrangment formula:
Number of ways to organize n elements into n positions(that is, number of elements is the same as the number of positions).

In this problem, we have that:
8 candles into 8 positions.
In the first spot, Cinnamon Spice.
In the second spot, Rose Petal.
The other 6 candles will be arranged into 6 positions.
In how many ways can he arrange the candles

He can arange the candles in 720 ways