Answer:
7. 2s^7
8. 2s^4/5s^2
9. 108s^9
10. h^7
Explanation:
7) (2s^3)^4
= 2s^(3+4)
= 2s^7.
8) (2s^2/5s)^2
= (2s^4/5s^2)
= 2s^4/5s^2.
9) 3s^5 × 4s^-2 × 9s^6
= 12s^{5+(-2)} × 9s^6
= 12s^3 × 9s^6
= 108s^9.
10) h^5/h^-2
= h^{5-(-2)}
= h^7.
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