To put the given numbers in order from smallest to largest, we compare their values:
6² = 6 * 6 = 36
3* = 3 (multiplication operator without a second operand is undefined)
2⁹ = 2 * 2 * 2 * 2 * 2 * 2 * 2 * 2 * 2 = 512
5³ = 5 * 5 * 5 = 125
Arranging them in ascending order:
5³ < 6² < 2⁹
So the correct order from smallest to largest is:
125 < 36 < 512