Here’s a refresher on our first ACT Challenge Question. If you haven’t had a chance to solve it yet, take a crack at it and then scroll down for the answer and explanation. No peeking!

## ACT Challenge Question #1

## Answer and Explanation

**ANSWER: C. 4x**

There are two ways to solve this problem: the “math” way and the “test prep strategy” way.

__Let’s talk about the test prep strategy way first.__ You see, this problem is a great candidate for plugging in numbers for and

Let’s try

Therefore

So now we have a corresponding value for

When

So, plugging in

A. 1/1024

B. 1/19

C. 32

D. 64

E. 1024

making our answer C.

__Now let’s talk about the math way__:

Using the exponent rule

so we can simplify the given equation

Since we found that **C.**