Josh and anthony have a lemonade stand. they charge $1 for 2 cups of
lemonade. thet sell 14 cups eaxh afternoon. is it reasonable to say that josh and anthony earned more than $50 after 3 afternoons?

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)