Find the perimeter of the polygon ABCD that has its vertices at A(2,-2), B6, -2), C6, 6), and D2, 6).
A) 24 units
B) 12 units
C) 64 units
D) 32 units

When turned about its axis of rotation, which shape could have created this three-dimensional object?

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)

Ahiker stands at an unknown elevation before he ascends 2 miles up a mountain to an elevation of 9 miles. find the elevation of the hiker before his ascent.