Suppose that a defined population is all right-handers, and a survey is being conducted. Which of these is an example of selection bias?

A. Including left-handers in the selection process of the survey

B. Including right-handers with brown hair in the selection process of the survey

C. Excluding left-handers from the selection process of the survey

D. Excluding right-handers with brown hair from the selection process of the survey

The position of a moving particle is given by the position function: f(t)=-9t-t^2-0.2t^3+0.1t^4 a. at what time does the particle reverse direction? b. when is the displacement positive? (round one decimal place and answer in interval notation) c. when is the displacement negative? (round one decimal place and answer in interval notation) d. when is the particle’s acceleration positive? (round one decimal place and answer in interval notation) e. when is the particle’s acceleration negative? (round one decimal place and answer in interval notation)