Final answer:
The correct answer to the calculation [21 + 13 × 10] is 151, which is reached by first performing the multiplication (13 × 10 = 130) and then adding to 21 (21 + 130 = 151).
Step-by-step explanation:
The result of the calculation [21 + 13 × 10] follows the order of operations, commonly known as PEMDAS (Parentheses, Exponents, Multiplication and Division, Addition and Subtraction). Since there are no parentheses explicitly indicating a different order, we first perform the multiplication, and then the addition.
- Multiplication: 13 × 10 = 130
- Addition: 21 + 130 = 151
Therefore, the correct answer to the calculation is 151, which is not listed among the options provided a) 214, b) 340, c) 154, or d) 440. It seems there may be an error in the question or the answer choices.