You know that the sum of a and b is 24, because the average is the sum of the numbers divided by the amount of numbers added together, and 12*2 is 24. Add 3 to 24 so you have 27, and then divide that by 3 because there are now 3 numbers in the set. The average of a, b, and c is 9.
A military force is a professional organization in which they are their to protect their country. They are authorized to use deadly weapons like bombs, grenades, and other sorts to protect their country at all cost
The line "Happy thoughts come to those with baked goods and fat cats." means that the reasons behind having happy thoughts include baked goods and fat cats. Maybe the person who said this loves cats and cookies, cakes, and pastries. <span />
B.) "She's gone from sounding like the smoke detector"
I do not know what your question is but if you are asking what is it then it could be a pipe under water that is dripping at a constant rate underwater which is why you only find it while wearing scuba gear.