Agroup of students is researching the music choices of america's high school students. to conduct the survey they take a poll at a high school in downtown new york city. will the results of this survey give the researchers a good indication of the music choices of america's youth? why or why not?
a) yes, students in new york city represent all of the students in the usa.
b) no, the students in the high school are not accustomed to being part of a survey.
c) yes, students in new york city have the best taste in music so they would make a great sample group.
d) no, in order to get an accurate sample, researchers should survey students from various high schools in various states including urban, rural, public, and private.

(urgent ) use pi 3.14 to estimate the circumference of the circle to the nearest hundredth middle is 4in (urgent )

The line containing the midpoints of the legs of right triangle abc where a(-5,5), b(1, 1), and c(3, 4) are the vertices.

The rate of decay of a radioactive substance depends upon the amount present initially. the mass y (mg) of the radioactive substance cobalt-60 present in a sample at time t (years) is represented by the exponential equation y=50e −0.1315 t . answer the following questions in complete sentences. 1. how does the exponential equation above compare to the equation for simple interest that is compounded continuously? explain the similarities. 2. what is the initial amount of cobalt-60 in the sample? 2. how much cobalt-60 is left after 8.4 years? show your work. 3. what would be the y-intercept of the graph? what does it represent? 4. after how many years will the amount of cobalt-60 left be 6.25 mg? explain what happens to the cobalt-60 after 50 years? 5. discuss some “real-world” examples and uses of cobalt-60