6.Escribe en forma de una sola potencia: 1. 33 · 34 · 3 =
2. 57 : 53 =
3. (53)4 =
4. (5 · 2 · 3)4 =
5. (34)4 =
6. [(53)4 ]2 =
7. (82)3

The question is kind of confusing. if it's asking how many variations of answers can you give. then do 4^5 for your answer.this would be something like the first question could be a and the 2nd c or first b next c etc. if you can, ask the teacher for a better confirmation of what it's asking. if i'm assuming correctly what it's asking, it's 625 different variations.

The discount is 8.70 . you dont tell us the percent of tax added so there is no way to find out, unless i'm not seeing anything. without tax its 37.70