Solve $A=\pi (5{)}^2$

Step-by-step solution

1. Step 1 · Circle area formula
   $$A=\pi r^2$$

   Area scales with the square of the radius.

2. Step 2 · Substitute r = 5
   $$A=\pi \cdot 25$$

   Square the radius before multiplying by π.

3. Step 3 · Evaluate
   $$25\pi \approx 78.54$$

   Exact form is preferred unless a decimal is requested.