Calculate the area of a circle with a radius of 2cm And a circle with a radius of four CM leave your answers in terms of pie. when the radius doubles does the area of the circle double?

What is the difference between the predicted value and the actual value

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)

Which of the following represents a function? 50 !