a. \( 8 a \) when \( a=2 \)
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When you plug \( a = 2 \) into the expression \( 8a \), you simply multiply 8 by 2. So, it's like making a delicious batch of cookies where each cookie has 8 chocolate chips, and you decide to bake 2 cookies. That means you'll end up with \( 8 \times 2 = 16 \) chocolate chips in total! Got a lot of variables bouncing around? Don’t forget to line them up neatly! It’s easy to mess up the numbers if your workspace (or mind) is cluttered. Always double-check your substitutions and do a quick mental math run-through before finalizing that answer. Practice makes perfect, so keep those calculations trending up!