To find out how long it will take Carla to read the full assignment, we first determine how long it takes her to read 1 page. Since it takes her 10 minutes to read 4 pages, we can calculate the time per page:
\[ \text{Time per page} = \frac{10 \text{ minutes}}{4 \text{ pages}} = 2.5 \text{ minutes per page} \]
Now we can find out how long it will take her to read 20 pages:
\[ \text{Total time for 20 pages} = 20 \text{ pages} \times 2.5 \text{ minutes per page} = 50 \text{ minutes} \]
Therefore, it will take Carla 50 minutes to read the full assignment.
The answer is c. 50 minutes.
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