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I know the answer so get it right maybe get brainliest

Which of these choices show a pair of equivalent expressions?

Given: circle o, cd is diameter, chord ab || cd. arc ab = 74°, find arc ca.

Marquise has 200 meters of fencing to build a rectangular garden. the garden's area (in square meters) as a function of the garden's width w w (in meters) is modeled by: a ( w ) = − w 2 + 1 0 0 w a(w)=−w 2 +100w what side width will produce the maximum garden area? meters