Triangle DEF has coordinates D(3, 4), E(4, 1), and F(1, -2). If the triangle is dilated by a scale factor of 2, what are the coordinates of D'?

Which expression is equivalent to sq-80

Find the area of the triangle shown 3 by 6

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)