Final answer:
By assuming the value of x to be 1, the equation 100x2 + 200 results in 400, which makes option B the correct answer.
Step-by-step explanation:
The equation 100x2 + 200 can be calculated by first solving the part within the parentheses. For the variable x, we will assume its value to be 1, although this is not explicitly stated in the question. Hence, the equation should be read as 100 multiplied by 2, and then add 200.
100 * 2 equals 200. Now, if you add 200 to it, the total is 400. Therefore, the answer is B. 400.