30=2x3x5
80=2 power of 4x5
120=2 power of 3x3x5=
Let's factor each number correctly.
For 30, we have:
30 = 2 x 3 x 5
This is the prime factorization of 30 and it's correct as you have stated it.
For 80, we have:
80 = 2^4 x 5
This is the correct prime factorization of 80. The exponent indicates that the factor 2 is used four times.
For 120, here's the correct prime factorization:
120 = 2^3 x 3 x 5
If you multiply 2 three times (2 x 2 x 2), which is 2 to the power of 3, or 2^3, you get 8. Multiply that by 3 to get 24, and then by 5 to get 120.