Researchers identified college students who generally were procrastinators or non-procrastinators. in a study, the students were asked to report throughout the semester how many symptoms of physical illness they had experienced. the study shows that late in the semester, procrastinating students reported more symptoms of physical illness than their non-procrastinating peers. complete parts (a) through (c) below. a. at the beginning of thesemester, procrastinators reported an average of 1.25 symptoms, increasing at a rate of 0.55 symptoms per week. write a function that models the average number of symptoms, y, after x weeks.? (use integers or decimals for any numbers in theequation.)

Jeffery conducted a survey in his school and found that 30 of the 50 eighth grade students' favorite subject is mathematics. based on the results, jeffery concluded that out of the 200 students in his school, 120 students' favorite subject is mathematics. select the statement that is true about jeffery's conclusion. a. jeffery's conclusion is not valid because the sample was biased since only 200 students were surveyed. b. jeffery's conclusion is valid because the sample was random since all of the students were eighth grade students. c. jeffery's conclusion is valid because the sample was random. d. jeffery's conclusion is not valid because the sample was biased since all of the students were eighth grade students.

Suppose that the price p (in dollars) and the weekly sales x (in thousands of units) of a certain commodity satisfy the demand equation 4p cubedplusx squaredequals38 comma 400. determine the rate at which sales are changing at a time when xequals80, pequals20, and the price is falling at the rate of $.20 per week.

What is the solution set of the quadratic inequality x^2-5< or equal to 0