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29. To determine the appropriate landing speed of an airplane the formula D=.123x+22 isused where x is the initial landing speed in feet per second and D is the distance needed in feet.If the landing speed is too fast the pilot may run out of runway; if the speed is too slow theplane may stall. What is the appropriate landing speed if the runway is 800 feet long? Show allof your work or explain how you came up with your solution30. The national catch of Atlantic Cod has been declining in the past few decades. We can modelthis decline with the equation y=.0032+.120x+1.909 where x is the number of years since1950 and y is the catch in millions of metric tons. In which year did the catch reach itsmaximum? In which year will the catch reach 0? For what years was the catch increasing?Decreasing? When was the catch greater than 2.5 million metric tons? Show all of your work orexplain how you came up with your solutions.

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