The temperature fell by 9 degrees Fahrenheit today. Write a signed number to represent this temperature change. anyone know the answer??
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Is fgh ~ jkl? if so, identify the similarity postulate or theorem that applies.

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)

Ijust need these 2 questions answered (the second pic is just confirmation i'm not confident in that answer)