A researcher is interested in the cholesterol levels of adults in the city in which she lives. A cholesterol screening program is set up in the downtown area during the lunch hour. Individuals can walk in and have their cholesterol determined for free. The service is used by 173 people, and their average cholesterol is 217.8. The sample obtained is an example ofA) simple random sample because the experimenter did not know beforehand which individuals would come to the screening. B) stratified sample of high- and low-cholesterol individuals. C) sample probably containing bias and undercoverage.

.C) sample probably containing bias and undercoverage.

Step-by-step explanation:A sample is a small number or part of a population which are collected or assembled with the aim of using them for experiment or research.

There are various process through samples can be obtained from a given popular, this includes random sampling, stratified sampling,clustered sampling etc.

A sample is expected not to be Bias(it should have a proper representation of majority of the members of the population), a sample is also expected to have no undercoverages(members of a population not effectively or optimally represented in the sample).

f(x) = x^3 -2x^2 -3x

x( x^2 -2x-3)

x( x^2 +x -3x -3)

x( x(x+1) -3(x+1))

x( x-3)( x+1)

so zeroes are 0, 3,-1

its (2) option