diff --git a/Ch4AppE10.cpp b/Ch4AppE10.cpp
new file mode 100644
index 0000000..4a29032
--- /dev/null
+++ b/Ch4AppE10.cpp
@@ -0,0 +1,60 @@
+#include <iostream>
+using namespace std;
+int main()
+{
+	double cost = 0.0;
+	double paid = 0.0;
+	double change = 0.0;
+	double dollar = 1.00;
+	double quarter = 0.25;
+	double dime = 0.10;
+	double nickel = 0.05;
+	double penny = 0.01;
+	double total = 0.0;
+	double changeBack = 0.0;
+	cout << "how much money does it cost? ";
+	cin >> cost;
+	cout << "how much did they pay? ";
+	cin >> paid;
+	total = paid - cost;
+	cout << total;
+	change = total;
+	if (dollar  < change)
+	{
+		changeBack =  change / dollar;
+		change = changeBack - change;
+		dollar = changeBack;
+		cout << change << endl;
+		cout << dollar << endl;
+	}
+	if (quarter <= change)
+	{
+		changeBack = change / quarter;
+		change = changeBack - change;
+		quarter = changeBack;
+		cout << quarter << endl;
+	}
+	if (dime <= change)
+	{
+		changeBack = change / dime;
+		change = changeBack - change;
+		dime = changeBack;
+		cout << dime << endl;
+	}
+	if (nickel <= change)
+	{
+		changeBack = change / nickel;
+		change = changeBack - change;
+		nickel = changeBack;
+		cout << nickel << endl;
+	}
+	if (penny <= change)
+	{
+		changeBack = change / penny;
+		change = changeBack - change;
+		penny = changeBack;
+		cout << penny << endl;
+	}
+	return 0;
+}
+
diff --git a/ch4App6.cpp b/ch4App6.cpp
new file mode 100644
index 0000000..9f3a954
--- /dev/null
+++ b/ch4App6.cpp
@@ -0,0 +1,13 @@
+#include <iostream>
+using namespace std;
+
+int main()
+{
+	double length = 100;
+	double width = 30.5;
+	double height = 4;
+
+	cout << length * width * height << endl;
+	
+	return 0;
+}
diff --git a/ch4AppE2.cpp b/ch4AppE2.cpp
new file mode 100644
index 0000000..0d39fbb
--- /dev/null
+++ b/ch4AppE2.cpp
@@ -0,0 +1,16 @@
+#include <iostream>
+#Nate Rowe
+#Matthew Jones
+#Andrew Rotton
+using namespace std;
+int main()
+{
+	double number = 0.0;
+	double square = 0.0;
+	cout << "what is your number: ";
+	cin >> number;
+	square =  number * number;
+	cout << square << endl;
+	return 0;
+}
+