It is: 11.5
Check: 2*(7.5+11.5) = 38
1,2,19,38
38 = 2 x 19
2 x 19 = 38
Their common factors are 1 and 2
Your pericardium (Heart Sac) IS a Sac In Witch your heart is surrounded by. Fluid is always being circulated, your body produces and absorbs this fluid. Fluid can build up around your heart from lots of different reasons. One of the main ones is caused by a infection. Symptoms may be Tiredness,weak,loss of apatite,loss of weight,dry mouth,dehydration, and more serious conditions Pain In The Chest, Abnormal skin color and Low Blood pressure. If Untreated this sac will eventually crush your heart leading to cardiac arrest. My Brother went like this for 2 weeks and had a BP of38/19 almost killing him. He went in for Emergency Heart Surgery. They Cut a 3 inch cut in his chest and ran a drain from it. After a Week in the hospital he was home and A Lot Better. If You think you might have this, Please get a ultrasound done and get the treatment you need. Thanks for reading, Steve