What is the missing step in this proof? A.

∠ABC ≅ ∠DBE

B.

∠BCA ≅ ∠BDE

C.

∠ACB ≅ ∠DEB

D.

∠BDE ≅ ∠ADE

E.

∠CAB ≅ ∠DAC ok

The john deere company has found that revenue,in dollars, from sales of heavy-duty tractors is a function of the unit price p, in dollars, that it charges. if therevenue r is r(p)= -1/2p^2 +1900pa)how much revenue will the company generate if they sell 700 tractors? b) how many tractors does the company want to sell to maximize the revenue?