Find the mean: 5, 7, 8, 9, 4

To find the mean, you add up all the numbers and then divide by the total number of numbers.

5 + 7 + 8 + 9 + 4 = 33

Now, divide 33 by the total number of numbers, which is 5:

33 / 5 = 6.6

Therefore, the mean of the numbers 5, 7, 8, 9, and 4 is 6.6.

Mean is the sum of all values divided by the number of values in a dataset. In this case, we have (5+7+8+9+4) / 5 = 33 / 5 = 6.6. Therefore, the mean of the given dataset is 6.6.