Question

can you please help

Answer 1

$\frac{\sqrt[]{16}}{\sqrt[]{81}}=\text{ }\frac{(16)^{\frac{1}{2}}}{(81)^{\frac{1}{2}}}=\text{ }\frac{(4X4)\frac{1}{2}}{(9X9\text{ )}\frac{1}{2}}=\text{ }\frac{4}{9}\text{ so option A is the answer }$