Among 13,963,753 males and 14,272,325 females, there were 20,734 cases of prostate cancer and 19,107 cases of female breast cancer diagnosed in 2012. calculate the incidence rates of prostate cancer and female breast cancer. express the rates with an appropriate rate base (for example, percent, or per 100,000

The incidence rate should be calculated by dividing the number of cases by the number of population at risk.

1. There are 13,963,753 males that have the risk of developing prostate cancer. There are 20,734 cases of prostate cancer found in 2012.
Then, the incidence rate of prostate cancer would be: 20,734/ 13,963,753= 0.148%= 148 case per 100,000 population

2. I will assume that the population that at risk of breast cancer is only female to solve this question(it is possible for men to develop breast cancer in real life).
There are 14,272,325 females that have the risk of developing female breast cancer. There are 19,107 cases of female breast cancer found in 2012.
Then, the incidence rate of the breast cancer would be: 19,107 /  14,272,325= 0.133% = 133 case per 100,000 population

B.) nitrogen fixationnitrogen fixation is the process of nitrogen molecules seeping into the soil and inside plant roots and bacteria. it gives more "life" to plants