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5-9.

Antonio’s function machine is shown at right. Homework Help ✎

1. What is $A(2)$?

9

2. If 81 came out, what was dropped in?

$3^x=81$

Since $9·9=81$ and $3·3=9$, how many threes will you multiply to make 81?

3. If 8 came out, what was dropped in? Be accurate to two decimal places.

See part (b).