Answer:
64?
Explanation:
Basically the idea is we suppose the number she thinks of is "x"
She says that if she cube roots the number and then quadruples it (means multiply by 4 I think) she gets 16. We set this up as equation below:
![4\sqrt[3]{x} = 16\\\sqrt[3]{x} = 4\\x = 4^(3)\\ x= 64](https://img.qammunity.org/2024/formulas/mathematics/high-school/7sdkfnmkdjko6i4h2bvgonpikcznnawfws.png)
This is my best guess, not totally sure sorry