Irina has 3 hours to finish her final math exam. Keeping in mind that there are 60 minutes in 1 hour, about how much time does she have for each question if there are 45 questions on the exam?

To find out how much time Irina has for each question, we first need to convert the 3 hours she has into minutes. Since there are 60 minutes in each hour:

\[
3 \text{ hours} \times 60 \text{ minutes/hour} = 180 \text{ minutes}
\]

Now, to find out how much time she has for each question, we divide the total time by the number of questions:

\[
\frac{180 \text{ minutes}}{45 \text{ questions}} = 4 \text{ minutes/question}
\]

So, Irina has 4 minutes to spend on each question.

The correct answer is **4 minutes**.