What are the requirements for a probability distribution? (select all that apply.) the summation of the probabilities is > 1. each probability takes on a value of 0 or 1. a description of all the values of the random variable x. associated probabilities for each value of x. the summation of the probabilities is < 1. each probability takes on values between 0 and 1 inclusive. each value of x has the same probability. the summation of the probabilities equal 1. incorrect: your answer is incorrect.

Which of the following represents the range of the graph of f(x) below

The position of a moving particle is given by the position function: f(t)=-9t-t^2-0.2t^3+0.1t^4 0 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)

The human resources manager at a company records the length, in hours, of one shift at work, x. he creates the probability distribution below. what is the probability that a worker chosen at random works at least 8 hours? probability distribution px(x) 6 hours 7 hours 8 hours 9 hours 10 hours 0.62 0.78 пол