After observing this pattern, Amira made a conjecture for the next number in the pattern. 4, 12, 36, 108, 324, ...

a. 332

b. 432

c. 972

d. 1296

First, lets observe this pattern.

We can notice that each number when multiplied by 3 gives the following number as:

4 x 3 = 12

12 x 3 = 36

36 x 3 = 108

108 x 3 = 324

Based on this, the next number in the pattern will be:

324 x 3 = 972

The right choice is:

c. 972