Humberto evaluates the expression 4 t 2 for t=3. He correctly substitutes 3 for t in the expression, but then says that the value is 144. However, he is incorrect! Can you identify what he may have done wrong? 1. What is the correct value of the expression?
2. Stating the rules of order of operations, what must be simplified first? What is then simplified second?
Answer these questions in a few sentences or use numerical equations to demonstrate your work.