Determine the number of degrees of freedom for the two-sample t test or ci in each of the following situations. (round your answers down to the nearest whole number.) (a) m = 12, n = 10, s1 = 5.0, s2 = 6.0

Aball is thrown from a height of 139 feet with an initial downward velocity of 15 ft/s. the ball's height h (in feet) after t seconds is given by the following. h=139-15t-16t^2 how long after the ball is thrown does it hit the ground? round your answer(s) to the nearest hundredth. (if there is more than one answer, use the "or" button.) t =

Ahyperbola centered at the origin has a vertex at (-6,0) and a focus at (10,0)

Which of the following statements must be true about this diagram? check all that apply. x°, y°, z°, & w°