The volume of spherical hot air balloon (in ft^3) t hours after 1: 00 pm is given by V(t) = 4/3 pi (9 - 2t)^3, where 0 less than or equal to t less than or equal to 4. Find the rate of change of the volume of the balloon with respect to t at 4: 00 pm.

Circle d circumscribes abc and abe. which statements about the triangles are true? statement i: the perpendicular bisectors of abc intersect at the same point as those of abe. statement ii: the distance from c to d is the same as the distance from d to e. statement iii: bisects cde. statement iv: the angle bisectors of abc intersect at the same point as those of abe. a. i only b. i and ii c. ii and iv d. i and iii e. iii and iv