![\"\"](\"/userfiles/image/steps_images/step1.JPG\")
A hang glider is ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=222c6d974524189b7891ad7727a9373d.png\")
above the ground.
It descend at a constant rate of ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=576f99397c4cf58aa0c34b3548ea0bf4.png\")
.
Therefore, height decreasing at time ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=a16a536fef06fc1158565c7288e36387.png\")
is ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=2fcc9edd07e2a1e1bc2023f473431ec8.png\")
.
Falling suggests a negative.
\Write the equation in terms of the height ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=0af643230a68f5096e4f80e98d07eabf.png\")
after seconds of descent.
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=411f68416552d1a4dab061617b59e9b6.png\")
.
Option D is right choice.
\![\"\"](\"/userfiles/image/steps_images/solution.JPG\")
Option D is right choice.