Alright! Let's break down the inequality \(r^3 \cdot 3 \geq 4\).

1. **Divide both sides by 3** to simplify the expression:
\[
r^3 \geq \frac{4}{3}
\]

2. **Cube root both sides** to solve for \(r\):
\[
r \geq \sqrt[3]{\frac{4}{3}}
\]

Now, you need to find the cube root of \(\frac{4}{3}\). With a calculator or some estimation, you can find the approximate value. Hope that helps! 😊

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