Answer: 2,2,2,2,5
Explanation:
You could start by thinking of two factors of ten like 8×10=80 or 16×5=80
Then factor those factors. 8 is 2*2*2 and 10 is 2*5. OR 16 is 2*2*2*2 and 5 is 5*1.
Either way you need four 2s and one 5 as prime factors of 80.
We skip the "1" because the definition of "prime" is a number with factors only of itself and one.