Hello!
Since there are five short-answer questions and she randomly selects one for a quiz, this can be written as 1/5 because there are 5 choices, but only one can be selected. 
Therefore, the probability that she will select question #3 is a 1/5 or 0.2 chance. 
 
        
             
        
        
        
25 questions 
Explanation: 20 divided by 25 is .8 which is 80%
        
             
        
        
        
Answer:
Step-by-step explanation:
f(x)=-2x(sqrt(-4))
-2(3)sqrt(-4)
-6(2i)
-12i