### Home > INT3 > Chapter 5 > Lesson 5.1.1 > Problem 5-9

5-9.

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

*A*(2)?If 81 comes out, what was dropped in?

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

9

3* ^{x}* = 81

Since 9 · 9 = 81 and 3 · 3 = 9, how many 3s do you need to multiply to make 81?

See part (b).

Guess and check to estimate the answer.

What is the answer close to?

Later you will learn how to solve an equation like this.