In circle a, marc bc is 61° and marc ef is 76°: points b, c, e, and f lie on circle a. Lines be and cf pass through point d, creating angle edf. The measure of arc bc is 61 degrees, and the measure of arc ef is 76 degrees. What is m∠fde? 30. 5° 38° 76° 68. 5°.

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This graph represents four ecosystems. each ecosystem has a different number of species, adding to its biodiversity. different colors represent different species. which statements correctly summarize the data depicted by the graph? 1. ecosystem d has more biodiversity than ecosystem c. 2. ecosystem b has more biodiversity than all the other ecosystems. 3. ecosystem a has more biodiversity than ecosystem b but less biodiversity than ecosystem c. 4. ecosystem b has more biodiversity than ecosystems c and d but less biodiversity than ecosystem a. 5. ecosystem a has more biodiversity than ecosystem c but less biodiversity than ecosystem b.

How do you work out 21.3-8= show your working. plz