Question

evaluate groups first. a power represents a group of repeated factors.
$2^3 + 20 = \boldsymbol{?} + 20$

Explanation:

Step1: Evaluate the power

The power \(2^3\) means \(2\times2\times2\). Calculating that, we get \(2\times2 = 4\), then \(4\times2 = 8\). So \(2^3 = 8\).

Step2: Substitute back

Now, substitute \(2^3\) with its value in the equation \(2^3 + 20\). So we have \(8 + 20\), which means the missing number is 8.

Answer:

8