fix(curriculum): unclear messages in step 54 of statistic calculator (#54441)

curriculum/challenges/english/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6353004b235d7a2e0b913f2b.md

@@ -7,7 +7,22 @@ dashedName: step-54
 
 # --description--
 
-To calculate a root exponent, such as $\sqrt[n]{x}$, you can use an inverted exponent $x^{1/n}$.
+To calculate a root exponent, such as $\sqrt[n]{x}$, you can use an inverted exponent $x^{1/n}$. JavaScript has a built-in `Math.pow()` function that can be used to calculate exponents.
+
+Here is the basic syntax for the `Math.pow()` function:
+
+```js
+Math.pow(base, exponent);
+```
+
+Here is an example of how to calculate the square root of `4`:
+
+```js
+const base = 4;
+const exponent = 0.5;
+// returns 2
+Math.pow(base, exponent);
+```
 
 Declare a `standardDeviation` variable, and use the `Math.pow()` function to assign it the value of $variance^{1/2}$.
 
@@ -25,13 +40,7 @@ Your `standardDeviation` variable should use the `Math.pow()` function.
 assert.match(getStandardDeviation.toString(), /standardDeviation\s*=\s*Math\.pow\(/);
 ```
 
-Your `standardDeviation` variable should use the `variance` variable.
-
-```js
-assert.match(getStandardDeviation.toString(), /standardDeviation\s*=\s*Math\.pow\(\s*variance\s*,/);
-```
-
-Your `standardDeviation` variable should use the `1/2` exponent.
+Your `Math.pow()` function should have a base of `variance` and an exponent of `1/2`.
 
 ```js
 assert.match(getStandardDeviation.toString(), /standardDeviation\s*=\s*Math\.pow\(\s*variance\s*,\s*1\s*\/\s*2\s*\)/);