A meteorologist records temperature changes in Modesto, CA as a cold front approaches. On Sunday, the average temperature decreased by 4.4 degrees from the day before. On Monday, the average temperature decreased by 8.8 degrees. On Tuesday, the average temperature decreased by 13.2 degrees. And on Wednesday, the average temperature decreased by 17.6 degrees.

Which of the following points represents the temperature change on Wednesday?

(1,−4.4)
(4,−17.6)
(4.4,17.6)
(4,17.6)

The random variable x represents the number of phone calls an author receives in a day, and it has a poisson distribution with a mean of 8.7 calls. what are the possible values of x

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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)