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In a classroom there are 7 male students and 11 female students that are
taking a test. If each student is equally likely to turn in their test at any given
time at the end of class, what is the probability that the first 3 students to
turn in their test are female students? Answer in fraction.

In the diagram, the measure of angle 9 is 85° which angle must also measure 85°?

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)

Find the zeros of each function. f(x) = 6x^2 - 7x - 20