Brainliest asap! ! what are the similarities and differences between a perfect square trinomial and the differences of squares?

Solve this and show you’re work step by step ! -5 3/4+3h< 9 1/4 -

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)

Erin bought christmas cards for $2 each to send to her family and friends. which variable is the dependent variable?