Which of the following is a quadratic function?
a. y = 4 ( x + 3 )
b. y = ( x - 5 ) ^2
c. y = 3x
d. y = -2 / x^2 + 1

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)

Abox holds 500 paperclips. after a week on the teacher's desk 239 paperclips remained. how many paperclips were used?

Given: prst square pmkd is a square pr = a, pd = a find the area of pmct.