Two samples, each with n=5 scores, have a pooled variance of 40. What is the estimated standard error for the sample mean difference

Need ! discuss how to convert the standard form of the equation of a circle to the general form. 50 points

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)

The vertices of a triangle are a(7.5), b(4,2), and c19. 2). what is