Step-by-step explanation:
Given that:-
So, we can concert 15 minutes to hours.
So, 
60 minutes = 1 hour
1 minute = 1/60
15 minutes = 

Okay, now we will apply first for 0.4 hours.





Now, second one:-



Hope it helps :D
 
        
             
        
        
        
the bag of rice weighs 4.5 pounds
Multiply 4.5 with 16 oz (as 1 lb = 16 oz)
4.5 x 16 = 72.
The bag of rice has 72 oz of rice inside.
The recipe only needs 60 oz of rice ∴ True, you will have enough, with 12 oz left over.
hope this helps