Yes, it looks like you are working with powers (the little numbers by the larger number) I assume you now multiplication if you are working on this so here is how you solve those problems. For my example, I will use problem (i)
You start with the numbers with powers so the first 4 a power is just a number multiplied by itself that many times. So you end up with
If you take 10 and have 3 decrease every minute and did it for 5 minutes it will go 10 7 4 1 -2 -5 That is 5 minutes of the temperature decreasing by 3 I hope it is right.