Question 1179578
**1. Find the z-score**

We want to find the z-score that corresponds to the 82nd percentile (100% - 18% = 82%).  This is because we're looking for the value that is *exceeded* by only 18%, meaning 82% of the values fall below it.

You can use a z-table or a calculator with a built-in inverse normal function to find this z-score. The z-score corresponding to the 82nd percentile is approximately 0.92.

**2. Use the z-score formula**

The z-score formula is:

z = (X - μ) / σ

Where:

* z = z-score 
* X = the value we want to find (the interest payment)
* μ = the mean (27 dollars)
* σ = the standard deviation (6 dollars)

**3. Plug in the values and solve for X**

0.92 = (X - 27) / 6

Multiply both sides by 6:

5.52 = X - 27

Add 27 to both sides:

X = 32.52

**Answer:**

An interest payment of **$32.52** is exceeded by only 18% of the bank's Visa cardholders.