9. Which of the following questions would yield data with variability? A How many nickels are in a coin collection?
B How many students in the 5th period class completed their project on January 27, 2014?
C How many dimes are in $6?
D How many students in Mr. Lee's fifth period class today have a last name that starts with M?

Jose predicted that he would sell 48 umbrellas. he actually sold 72 umbrellas. what are the values of a and b in the table below? round to the nearest tenth if necessary

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)

If abcde is reflected over the x-axis and then translated 3 units left, what are the new coordinates d?