A) 1
B) 10
C) 45
D) 60
E) 90
                                             
                                          
                                          
                                        
											 
											i believe the answer is 62.5 because if you multiply 50 mby 50 you get 2,500 and when you divide 2,500 by 40 you get 62.5.
hope this helps!