docs: update function description

Author: anandkaranubc

lib/node_modules/@stdlib/math/base/special/powf/README.md

@@ -20,7 +20,7 @@ limitations under the License.
 
 # Exponential Function
 
-> [Exponential function][exponential-function].
+> [Exponential function][exponential-function] for a single-precision floating-point number.
 
 <section class="intro">
 
@@ -55,7 +55,7 @@ var powf = require( '@stdlib/math/base/special/powf' );
 
 #### powf( base, exponent )
 
-Evaluates the [exponential function][exponential-function] for single-precision floating-point values.
+Evaluates the [exponential function][exponential-function] for a single-precision floating-point number.
 
 ```javascript
 var v = powf( 2.0, 3.0 );
@@ -141,7 +141,7 @@ for ( i = 0; i < 100; i++ ) {
 
 #### stdlib_base_powf( base, exponent )
 
-Evaluates the exponential function for single-precision floating-point values.
+Evaluates the exponential function for a single-precision floating-point number.
 
 ```c
 float out = stdlib_base_powf( 3.1415927410125732f, 5.0f );

lib/node_modules/@stdlib/math/base/special/powf/docs/repl.txt

@@ -1,6 +1,7 @@
 
 {{alias}}( b, x )
-    Evaluates the exponential function `bˣ` for single-precision floating-point values.
+    Evaluates the exponential function `bˣ` for a single-precision
+    floating-point number.
 
     Parameters
     ----------

lib/node_modules/@stdlib/math/base/special/powf/docs/types/index.d.ts

@@ -19,7 +19,7 @@
 // TypeScript Version: 4.1
 
 /**
-* Evaluates the exponential function for single-precision floating-point values.
+* Evaluates the exponential function for a single-precision floating-point number.
 *
 * @param b - base
 * @param x - exponent

lib/node_modules/@stdlib/math/base/special/powf/lib/index.js

@@ -19,7 +19,7 @@
 'use strict';
 
 /**
-* Evaluate the exponential function for single-precision floating-point values.
+* Evaluate the exponential function for a single-precision floating-point number.
 *
 * @module @stdlib/math/base/special/powf
 *

lib/node_modules/@stdlib/math/base/special/powf/lib/main.js

@@ -88,7 +88,7 @@ var LOG_WORKSPACE = 0.0;
 // MAIN //
 
 /**
-* Evaluates the exponential function for single-precision floating-point values.
+* Evaluates the exponential function for a single-precision floating-point number.
 *
 * @param {number} x - base
 * @param {number} y - exponent

lib/node_modules/@stdlib/math/base/special/powf/lib/native.js

@@ -26,7 +26,7 @@ var addon = require( './../src/addon.node' );
 // MAIN //
 
 /**
-* Evaluates the exponential function for single-precision floating-point values.
+* Evaluates the exponential function for a single-precision floating-point number.
 *
 * @private
 * @param {number} x - base