14. An inflatable raft is dropped from a hovering helicopter to a boat in distress below. The height of the raft above the water, in metres, is approximated by the equation y = 500 - 5x², where x is the time in seconds since the raft was dropped. a) What is the height of the helicopter above the water? When does the raft reach the water? b) c) What is the height of the raft above the water 6 s after it is dropped? d) When is the raft 100 m above the water?

14. An inflatable raft is dropped from a hovering helicopter to a boat in distress below. The height of the raft above the water, in metres, is approximated by the equation y = 500 - 5x², where x is the time in seconds since the raft was dropped. a) What is the height of the helicopter above the water? When does the raft reach the water? b) c) What is the height of the raft above the water 6 s after it is dropped? d) When is the raft 100 m above the water?

Algebra: Structure And Method, Book 1

(REV)00th Edition

ISBN:9780395977224

Author:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole

Publisher:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole

Chapter10: Inequalities

Section10.3: Solving Problems Involving Inequalities

Problem 14P

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