Patricia bought 16 hairclips for $3. x number of hairclips costs 15 cents each while the rest cost 20 cents each.
a) write an inequality in terms of x
b) find the minimum number of 15 cent hairclips she bought

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)