Answer:
C. $30
Explanation:
So we know that in 2007 the fee was $40 and we want to figure out what is 3/4 of 40.
To solve that we can start off with 40 and divide it by 4. Which is like saying "I'm finding what one fourth of 40 is." The answer to that is 10.
Because 10 is ONE fourth we multiply by 3 to find what 3/4 of 40 is. 10x3=30 and that's why 3/4 of 40 is 30.
Hope that helps and have a great day!