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anonymous
 one year ago
A toy rocket was launched from the ground. The function f(x) = 16x2 + 128x shows the height of the rocket f(x), in feet, from the ground at time x seconds. What is the axis of symmetry of the graph of f(x), and what does it represent?
anonymous
 one year ago
A toy rocket was launched from the ground. The function f(x) = 16x2 + 128x shows the height of the rocket f(x), in feet, from the ground at time x seconds. What is the axis of symmetry of the graph of f(x), and what does it represent?

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.0so the 'x' coordinate of our vertex is 4... so I'm going to say the rocket would take 4 seconds to get up to maximum height...and then it will fall back down taking 4 seconds How do i know it will only take 4 seconds to get down? Well I would find out the xintercepts of the parabola by factoring 16x^2 + 128x = 0 factor our like terms 16x(x  8) = 0 so we have 2 equations 16x = 0 and (x  8) = 0 well that means our 2 x intercepts are 0 and 8 So if it take 4 seconds to go up to the max height...we only have 4 seconds to fall back down Hence the answer being B

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Woah, Where did you get that answer from?

misty1212
 one year ago
Best ResponseYou've already chosen the best response.0first coordinate of the vertex is always (i repeat always ) \[\frac{b}{2a}\]

misty1212
 one year ago
Best ResponseYou've already chosen the best response.0do \[\frac{128}{2\times (16)}\] and that is all

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0@misty1212 What he did was, He went on google, Searched up my question. And some other guy that has already posted this question answered it.

misty1212
 one year ago
Best ResponseYou've already chosen the best response.0i love google, but \(\frac{b}{2a}\) cannot be that hard to compute in any case what does "the answer is B" mean in this context?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Like this http://widget.openstudy.com/study#/updates/5344393ae4b02bb88e656693 Then he just takes credit for the answer

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Thanks @LesTwins I do the same. I already got that answer but I want to double check. Quite slick.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0I did the math then searched with google to give u the insurance you need to get the question correct
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