Answer:
5. [tex]4b^8c^3[/tex]
6. [tex]30t^6v^1^0[/tex]
Step-by-step explanation:
5. [tex](-4b^6)(-b^2c^3)\\4b^8c^3[/tex]
6. [tex](10t^4v^5)(3t^2v^5)\\30t^6v^1^0[/tex]
