To determine the correct scientific notation for 3.15 trillion, we should first understand the terminology and convert that into a numerical value.
A trillion is defined as 1,000,000,000,000, which in scientific notation is [tex]\(10^{12}\)[/tex].
Given the number 3.15 trillion, we can express it numerically as:
[tex]\[ 3.15 \times 1,000,000,000,000 \][/tex]
In scientific notation, this would be:
[tex]\[ 3.15 \times 10^{12} \][/tex]
Therefore, the correct answer is:
C. [tex]\(3.15 \cdot 10^{12}\)[/tex]