Final answer:
First solve the expression within the parentheses to get (4/9). Then you square that result by multiplying it with itself to get 16/81, which is the final answer.
Step-by-step explanation:
To evaluate the expression ((1+3)/9)², we first perform the operation within the parentheses. This arithemetic gives us (4/9). The resulting expression is then (4/9)². Squaring a number, or in this case a fraction, means multiplying it by itself. So we multiply (4/9) by (4/9) which equals 16/81. Therefore, the value of the expression ((1+3)/9)² is 16/81.
Learn more about evaluating expressions