13√9+16

|5-7|^2

I got 9.40 but I think I might have done it wrong

Order of operation done by hand

To calculate the expression 13√9+16, you need to follow the order of operations, which is also known as the PEMDAS rule (Parentheses, Exponents, Multiplication and Division, and Addition and Subtraction).

Let's break it down step by step:

1. Evaluate the square root of 9: √9 = 3.
2. Multiply the result by 13: 13 * 3 = 39.
3. Add 16 to the previous result: 39 + 16 = 55.

So, the value of the expression 13√9+16 is 55.

Now, let's move on to the second expression: |5-7|^2.

1. Subtract 5 from 7: 7 - 5 = 2.
2. Find the absolute value of 2: |2| = 2.
3. Calculate the square of 2: 2^2 = 4.

Therefore, the value of the expression |5-7|^2 is 4.

Now, comparing your answer of 9.40, it seems that you might have made an error in your calculations. By following the correct order of operations, the correct values are 55 and 4 for the respective expressions.