3. An emergency flare is fixed upward from a small boat. The flight of the flare can be modelled by the function h(t) 5t² + 40t +4where h(t) is the height of the flare above the ground in metres and 't' is the time in seconds since the flare was fired. 17 a) Will the flare reach a height of 82m? b) For how long will the flare be at a height of 20m or above?
3. An emergency flare is fixed upward from a small boat. The flight of the flare can be modelled by the function h(t) 5t² + 40t +4where h(t) is the height of the flare above the ground in metres and 't' is the time in seconds since the flare was fired. 17 a) Will the flare reach a height of 82m? b) For how long will the flare be at a height of 20m or above?
Chapter9: Quadratic Equations And Functions
Section9.6: Graph Quadratic Functions Using Properties
Problem 9.104TI: A path of a toy rocket thrown upward from the ground at a rate of 208 ft/sec is modeled by the...
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Transcribed Image Text:3. An emergency flare is fixed upward from a small boat. The flight of the flare can be modelled by the
2
function h(t) =- 5t + 40t +4where h(t) is the height of the flare above the ground in metres and 't' is the
time in seconds since the flare was fired.
17
a) Will the flare reach a height of 82m?
b) For how long will the flare be at a height of
20m or above?
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