There were 100 new cases of syphilis last year in a given population of 100,000 people. at that time, 500 people in this population already had syphilis. the incidence of syphilis in this population is . 100 per 100,000b. 500 per 100,000c. 1000 per 100,000d. 5000 per 100,000

a) 100 per 100,000

Explanation:

The term Incidence refers to the number of individuals who develop a specific disease during a particular time period (a month, a year, etc) in a certain population. Thus, incidence refers to the new cases that present in a population over the course of some specific amount of time.

In this case, there were 100 NEW cases of syphilis last year in a population of 100,000 people.

Since incidence refers to only the new cases of a disease we really don't need to focus on the 500 people who already had syphilis.

Thus, the incidence of syphilis in this population is a) 100 per 100,000

there is no stairs in bungalow

explanation:

poof

sheep is a herbivore animal whereas grasshopper belongs to the class chordates but both of them feed on greens.  

if grasshopper and sheep feeding on a pasture land, i do not think both of them will have any impact on each other. however, the number of the species can make difference. since sheep feed on greens, there is a possibility there left no pasture land for the grasshoppers or they may get extinct.