Answer:
30 students are in the science class and 3 students recieved a failing grade.
 
        
                    
             
        
        
        
Answer:
option A. 21 sec
Step-by-step explanation:
Speed = the distance over the time
Given: 
Speed = 2 m/s  and distance = 42 m and time = t
So,
2 = 42/t
Solve for t
t = 42/2 = 21 sec.
The answer is option A. 21 sec
 
        
             
        
        
        
<span>books to bookmarks
books : bookmarks
10 : 1
10 * 3 : 1 * 3
30 : 3
3 bookmarks
Since the book store sold 30 books they also sold 3 bookmarks.
Answer: 3 bookmarks</span>
        
             
        
        
        
Answer:
0.00909090909
Step-by-step explanation: