1.What is the population growth rate per year if ten years apart (year 20 and year 10) the population has increased from 20,000 to 100,000?

A. 15.00

B. 16.00

C. 17.00

2.Using the rule of 72, if the population were to grow at a rate of 6% a year, how long would it take to double?

A. 16.00

B. 12.00

C. 8.00

3.What is the Case fatality rate of a disease if the number of deaths from the disease is 40, number of diagnosed cases of the disease is 100, and there are 20 unknown cases of the disease?

A. 0.40

B. 0.60

C. 0.80

4.What is the infection fatality rate of a disease if the number of deaths from the disease is 40, number of diagnosed cases of the disease is 100, and there are 20 unknown cases of the disease?

A. 0.33

B. 0.40

C. 0.16