8. Target-shooting disks are launched into the air from a machine 12 mabove the ground. The height, h(t), in metres, of the disk after launchis modelled by the function h(t) = -5t² + 30t + 12, where t istime in seconds.a) When will the disk reach the ground?b) What is the maximum height the disk reaches?

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Advanced Engineering Mathematics

10th Edition

ISBN:9780470458365

Author:Erwin Kreyszig

Publisher:Erwin Kreyszig

Chapter2: Second-order Linear Odes

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above the ground. The height, h(t), in metres, of the disk after launch is modelled by the function h(t) = -5t² + 30t + 12, where t is time in seconds. a) When will the disk reach the ground? b) What is the maximum height the disk reaches?