Final answer:
To compute the limit as t approaches positive infinity for the given expressions, consider the term with the highest degree of t, which is 1.917t in the expression J(t). As t approaches positive infinity, this term will dominate the other terms, and the limit will be infinity.
Step-by-step explanation:
The student is asking to compute the limit as t approaches positive infinity for the given expressions: P(t) = 1.743t + 29.84 billion dollars, C(t) = 1.096t + 10.65 billion dollars, and J(t) = 1.917t + 12.36 billion dollars.
To compute this limit, we need to consider the term with the highest degree of t, which is 1.917t in the expression J(t). As t approaches positive infinity, this term will dominate the other terms, and the limit will be infinity.