Final answer:
The question requires solving a mathematical expression by following the proper order of operations and then expressing the answer in scientific notation with the correct number of significant figures.
The correct answer is D.
Step-by-step explanation:
The question involves solving a complex series of operations step-by-step and then converting the final answer into scientific notation to the appropriate number of significant figures. In solving the expression, one must carefully follow the order of operations, also known as PEMDAS (Parentheses, Exponents, Multiplication and Division, Addition and Subtraction), to arrive at the correct result.The correct answer is D.
However, without parentheses indicating the order of operations, or additional context to the sequence of expressions, we need to make an assumption about the intended order. This resembles part of a sequence of operations that could be a 'follow the correct order' type of problem.
After solving, the answer should be converted into scientific notation with the correct number of significant figures, ensuring that the final answer reflects the precision of the given values.