Suppose a hot air balloon begins descending at a rate of 30ft/min from an elevation of 1250ft. write an equation to model the hot air balloon's elevation as a function of time.

In the figure below, segment ac is congruent to segment ab: which statement is used to prove that angle abd is congruent to angle acd? a.)triangle acd is similar to triangle abd. b.)triangle acd is congruent to triangle abd. c.)segment a.d. is congruent to segment ac. d.)segment a.d. is congruent to segment dc.