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shelby1290
 one year ago
Mini flares are used by some boaters in an emergency. The flight of a flare, when fired at an angle of 70 degrees to the horizontal, is modelled by the function: h(t) = 9(t3)^2+83
where h is the height, in metres, and t is the time, in seconds, since the flare was fired.
a) What is the maximum height of the flare?
b) After how many seconds does the flare reach its maximum height?
c) For how many seconds does the flare burn before it hits the ground?
d) State the domain and range of the function
shelby1290
 one year ago
Mini flares are used by some boaters in an emergency. The flight of a flare, when fired at an angle of 70 degrees to the horizontal, is modelled by the function: h(t) = 9(t3)^2+83 where h is the height, in metres, and t is the time, in seconds, since the flare was fired. a) What is the maximum height of the flare? b) After how many seconds does the flare reach its maximum height? c) For how many seconds does the flare burn before it hits the ground? d) State the domain and range of the function

This Question is Closed

shelby1290
 one year ago
Best ResponseYou've already chosen the best response.0I've already done part a) and b) a) 83 m b) 3 seconds

dan815
 one year ago
Best ResponseYou've already chosen the best response.0I think instead of just giving you the answer the best way i can help you is with thsi

dan815
 one year ago
Best ResponseYou've already chosen the best response.0you have a parabola here, when you have height zero it passed through the x axis

dan815
 one year ago
Best ResponseYou've already chosen the best response.0h(t) = 9(t3)^2+83 h(t)=0 what must the time be

shelby1290
 one year ago
Best ResponseYou've already chosen the best response.0am i substituting 0 for t?

dan815
 one year ago
Best ResponseYou've already chosen the best response.0no height is 0, we have to time the t, or the time when it is

dan815
 one year ago
Best ResponseYou've already chosen the best response.0h(t) = 9(t3)^2+83 h(t)=0 0=9(t3)^2+83 solve for t

shelby1290
 one year ago
Best ResponseYou've already chosen the best response.0dw:1443151642697:dw

shelby1290
 one year ago
Best ResponseYou've already chosen the best response.0@dan815 i feel like i'm doing everything wrong ^
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