A fundraising dinner was held on two consecutive nights. On the first night,
100 adult tickets and 175 children's tickets
were sold for a total of $937.50. On the
second night, 200 adult tickets and 316
children's tickets were sold for a total
of $1790. What was the price for a
children's ticket?

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)