'Box inches' diaporamas de présentation

Example

Example. Suppose a firework is launched with an upward velocity of about 80 ft/sec from a height of 224 feet. Its height in feet, h ( t ), after t seconds is given by h ( t ) = ?16 t 2 + 80 t + 224 After peaking how long will it be before the shell is 224 feet above ground again?

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