Carla needs to complete her science homework. She has 20 pages to read and 14 questions to answer. If it takes Carla 10 minutes to read 4 pages, how many minutes will it take her to read the full assignment?
A. 85 minutes
B. 35 minutes
C. 50 minutes
D. 9 minutes
Since Carla can read 4 pages in 10 minutes, she can read 20 pages in 10 * (20/4) = <<10*(20/4)=50>>50 minutes.
Therefore, the answer is C. 50 minutes.