Simplify (3c•7)•2

To simplify the expression (3c•7)•2, we can follow the order of operations, which is commonly known as PEMDAS (Parentheses, Exponents, Multiplication and Division from left to right, Addition and Subtraction from left to right).

The expression involves parentheses and multiplication. First, let's simplify what is inside the parentheses:

3c•7

To multiply 3c by 7, we simply multiply the numbers together:

3c•7 = 21c

Now, our expression becomes:

(21c)•2

Finally, we multiply 21c by 2:

(21c)•2 = 42c

Therefore, the simplified expression is 42c.