What is the perimeter of the rectangle in the coordinate plane?

40 units
50 units
96 units
154 units

Acar travels at an average speed of 52 miles per hour. how long does it take to travel 299 miles

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)

Do you mind if you guys me with this question i’m on number 8