31. Which is the geometric mean of. 32. This allows the definition of the arithmetic-geometric mean , a mixture of the two which always lies in between. 33. It repeatedly replaces two numbers by their arithmetic and geometric mean, in order to approximate their arithmetic-geometric mean . 34. All of the above effects can be attributed to the concept of Geometric Mean Radius ( GMR ). 35. Note that the geometric mean of link weights within a subgraph is called the intensity of that subgraph. 36. Therefore \ tilde \ omega is proportional to the geometric mean of the Earth and spinning angular velocities. 37. It repeatedly replaces two numbers by their arithmetic and geometric mean , in order to approximate their arithmetic-geometric mean. 38. The business climate is a geometric mean of the balances of the business situation and the business expectations. 39. Thus, the geometric mean is generally used for estimating the " average " radon concentration in an area. 40. The arithmetic mean between 30 ? and 77 ? is 53.5 ?; the geometric mean is 48 ?.