3 ∛16 + ∛54

To solve the expression 3 \sqrt[3]{16} + \sqrt[3]{54}, we calculate cube roots:

1. Calculate \sqrt[3]{16}:
- The cube root of 16 is approximately 2.5198421.

2. Multiply the cube root of 16 by 3:
- 3 \times 2.5198421 = 7.5595263

3. Calculate \sqrt[3]{54}:
- The cube root of 54 is approximately 3.7797631.

4. Add the results from steps 2 and 3:
- 7.5595263 + 3.7797631 = 11.3392894

The answer is approximately 11.3392894.