Question

Base 3 expoente 5 vezes base 3 expoente 7

Answer 1

3^5=243 
3^7=2187
243*2187=531441

Answer 2

$3^5\times 3^7\to~ multiplica\c c\~ao ~~de~~bases~~iguais~~e~~expoentes~~diferentes,\\\\conservamos~~a~~base~~e~~somamos~~os~~expoentes:\\\\ 3^{5+7}\to~~3^{12}\to~~\boxed{531441}$