The correct answer is optionD 134/200.
The frequency of the dominant allele can be calculated by the summation of the frequency of the homozygous individual frequency that has  dominant allele  and half of the heterozygous individuals, as half of the heterozygotes have dominant allele.
The frequency is no of individual of desired trait divided by total number of individual. 
The calculation is shown below:
 
        
                    
             
        
        
        
Answer: Epidemiology 
Explanation:
Epidemiology is a branch of medicine, the study of human health and disease at the population level. Epidemiology deals with the incidence, distribution, prevalence and possible control of diseases and other factors relating to health. By tracking the cause and distribution of the disease among many individuals of the population, epidemiologist can identify potential stategies for the preventing and controlling of diseases and disorders.
 
        
                    
             
        
        
        
Decomposer's role is to break down dead food. They basically eat it, then the dead food or the dead animal gets ground into the ground, and makes the soil good. Like worms, or fungi, mushrooms, etc. Rotten fruit  is not really wasted because 1) the decomposers eat it, and 2) it makes the soil good
        
                    
             
        
        
        
You got all of them right if you need help with fourth one I can’t see it
        
             
        
        
        
Final speed - Initial speed / time.
50.0 - 20.0 / 5.0 
30.0 / 5.0
= 6.0 (km/h)/s 
Correct choice is B.