Final answer:
To find the whole number that will make the given expression true, substitute different values for O and check which one satisfies the condition.
Step-by-step explanation:
To find the whole number that will make the given expression true, we need to understand exponentiation. Raising a number to a power is a shorthand way of multiplying the number by itself multiple times.
In this case, we have the expression O^3, where O represents an unknown whole number. Let's try substituting different whole numbers and see which one makes the expression true.
If we try O = 3, then O^3 = 3^3 = 27, which is not true.
If we try O = 4, then O^3 = 4^3 = 64, which is also not true.
If we try O = 5, then O^3 = 5^3 = 125, which is true.
Therefore, the whole number that will make the expression true is 5.