Researchers call random radio listeners on the phone to rank five different popular songs. this research radio stations decide which songs to play more often. this method of gathering data is classified a census. a sample survey. an experiment. an observational study.

I believe the answer is the second choice:

A Sample Survey.

Hope this helps!

Right A sample survey

During a survey the information is collected from a sample of the population, in other words:

The data collection only involves part of the total population

This means that the group selected for the research represents the whole population, as it happened with the random calls to the  radio listeners to rank five different popular songs.

If this were a census, the information would be gathered from every member of the population, this means the whole population and no sampling method would be used .

x = 25

step-by-step explanation:

a^2+b^2=c^2

7^2+24^2=c^2

49+576=625

sqrt625=25

x=25

(x, y)→(x − 8, y − 7)

step-by-step explanation:

enjoy!