Find the dimensions of a rectangle whose width is 8 miles less than its length and whose area is 105 square miles

Is the orthocenter of a triangle on the inside ?

If c(x) = 4x – 2 and d(x) = x2 + 5x, what is (cxd)(x)

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)