Answer:
B
Step-by-step explanation:
using the rules of exponents
• [tex]a^{\frac{m}{n} }[/tex] ⇔ [tex]\sqrt[n]{a^{m} }[/tex]
• [tex](a^m)^{n}[/tex] = [tex]a^{mn}[/tex]
[tex](3m)^{\frac{2}{5} }[/tex]
= [tex]\sqrt[5]{(3m)^2}[/tex]
= [tex]\sqrt[5]{9m^2}[/tex] → B
