Wang Lei and Amira were asked to find an explicit formula for the sequence $30\,,\,150\,,\,750\,,\,3750,...$. Wang Lei said the formula is $g(n)=30\cdot5^{\large{n-1}}$, and Amira said the formula is $g(n)=6\cdot5^{\large{n}}$. **Which one of them is right?** [[☃ radio 1]]