Answer:
B
Step-by-step explanation:
because in the periodic table nitrogen is 7, and oxygen is 16
The answer is 16 because 5(2) is 10 plus 3(2) which is 6 so 10+6 is 16
14,400
multiply 4 by 60 to get 240 because you need to know how many pounds per minute
multiply 240 by 60 to get 14,400 multiplying how many pounds he gets in one minute by 60 because theres 60 minutes in a hour