The risk for skin damage and skin cancer is related to the number of sunburns a person experiences throughout his or her lifetime. The following physical characteristics also increase the risk for sunburn, skin damage, and skin cancer:
Retention rates are a measure of academic progression of a group of students from one. period of time to the next. Graduation rates are a measure of the success of those students. in attaining their academic goals.
But in most cases the goal is to keep retention rates as high as possible, if only because it's expensive to land new customers. The same data lets you calculate customer acquisition rate. You picked up 40 new customers, so your acquisition rate was 20 percent.