If a rock falls from a height of20 meters on Earth, the height H (in meters) after x secondsis approximately H(x) = 20 - 4.9x2 (a) What is the height of the rock when x = 1 second?x = 1.1 seconds? x = 1.2 seconds? x = 1.3 seconds?(b) When is the height of the rock 15 meters? When is it10 meters? When is it 5 meters?(c) When does the rock strike the ground?

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Differential Equations

Have you ever observed the movement of the satellites and rockets or how the planets go around the sun in their orbits? How will you determine their motion? Definitely they follow some scientific laws and these kinds of problems are framed as differential equations.