If he is 4 now is in 10 years he will be 14 and if you multiply that by 2 you get 28 which means in 10 years Marie will be 28 so that means if you take away 10 the answer should be 18 but that isn't there but that's how I would work it out.
Answer:
yes it is true it is gaining per second
Answer:
would be like your hair,eyes,smile etc.
Explanation:
The mass of freon-11 gas is m=0.597g m = 0.597 g .
