Keith, Annie, Elizabeth, and Marcus are taking a picture. How many different ways can the friends stand in a horizontal line?

Each person can stand 4 different ways I believe So I'm thinking 16 different ways all together.

The number of ways is

4 x 3 = 12

(4 differenct people can be placed in the 1st spot, leaving 3 remaining people to fill the 2nd place)

then there are 2 to fill the third place

24

To find the number of different ways the friends can stand in a horizontal line, we need to count the number of possible permutations.

First, let's determine how many choices we have for the first friend to stand in the line. We have 4 friends, so there are 4 choices for the first position.

After the first friend stands, we have 3 remaining friends to choose from for the second position. So, there are 3 choices for the second position.

Similarly, for the third position, we have 2 remaining friends to choose from.

Finally, for the fourth position, we have only 1 remaining friend.

Therefore, the total number of different ways the friends can stand in a horizontal line is calculated by multiplying the number of choices for each position:

4 * 3 * 2 * 1 = 24

So, there are 24 different ways the friends can stand in a horizontal line.