Iam doing the pythagorean theorum. the bottom of a 13 foot straight ladder is set into the ground 5 feet away from the wall. when the top of the ladder leaner against the wall, what was the distance above the ground it will reach

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)

Does anyone know how to solve and graph this: 4 + | a + 2 | < 7the only part i don't get is the "4 +"

Do,h = (7, 9) (14, 18) the scale factor is