help me with this please

Answer:
c) =[tex]10y^7[/tex]
d) =[tex]12 g^4 h^5[/tex]
Step-by-step explanation:
Part c: [tex]2y^4 * 5y^3\\[/tex]
The constants will be multiplied and variable will be written once with adding their respective powers as follows:
= [tex]10 y^(4+3)[/tex]
=[tex]10y^7[/tex]
Part d: [tex]3gh^2 * 4g^3h^3[/tex]
The constants will be multiplied and each variable will be written once with adding their respective powers as follows:
= [tex]12 g^(1+3) h^(2+3)[/tex]
=[tex]12 g^4 h^5[/tex]
I hope it will help you!