Which statement is true
a. all rectangles are rhombuses
b. all isosceles trapezoids are quadrilaterals
c. all quadrilaterals are squares
d. all parallelograms are rectangles

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)

What is the solution to the equation below? 3/x-2+6=square root x-2 +8

Twelve less than a number is at most 20