The answer is going to be 12.9 and the median height will be 16.5 hope that helped
Answer:

Step-by-step explanation:
It legally recognised the belligerent status of the Confederate States of America (CSA) but never recognised it as a nation and neither signed a treaty with it nor ever exchanged ambassadors.
And i could tell that its not math... :)
Its False
The first option is correct
R = {10; 15; 20}
S = {20; 25}
R U S = {10;15; 20; 25;