Hey there! :) How are you? Basically what you said is right. 
Question 1: There are 16 oz (ounces) in a pound, so we do 64/16= 4 lbs (pounds). 
Question 2: If Jack has 3 pounds of pasta, that would mean he has 48 ounces, since 1 pound is 16 oz, so 16*3= 48 ounces. 
Hoped I helped! Have a nice day, and keep smiling! :)
        
             
        
        
        
 A. 1 because a to b is 5 miles and b to c is 4 miles so it couldn't be 1 mile
        
             
        
        
        
10/3 which is the same as 3 1/3
        
                    
             
        
        
        
Basically we need to add and subtract 1/2 from 1/6:
(1) 1/6 - 1/2 = 1/6 - 3/6
 = -2/6
 = -1/3
(2) 1/6 + 1/2 = 1/6 + 3/6
 = 4/6
 = 2/3
Therefor the two numbers that are located 1/2 unit from 1/6 are -1/3 and 2/3