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anonymous
 one year ago
A sandbag was thrown downward from a building. The function f(t)=16t^232t+384 shows the height f(t), in feet, of the sandbag after t sec;
Part A: factor the function f(t) and use the factors to interpret the meaning of the x intercept of the function
anonymous
 one year ago
A sandbag was thrown downward from a building. The function f(t)=16t^232t+384 shows the height f(t), in feet, of the sandbag after t sec; Part A: factor the function f(t) and use the factors to interpret the meaning of the x intercept of the function

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myininaya
 one year ago
Best ResponseYou've already chosen the best response.5Are you having trouble factoring?

myininaya
 one year ago
Best ResponseYou've already chosen the best response.5f(t)=at^2+bt+c if f is factorable, you should be able to find two integer numbers that when multiplied give you a product of a*c and a when added give you a product of b.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0I don't think I understand it. I came up with (8, 320) for first part but not sure if right and I don't understand second part

myininaya
 one year ago
Best ResponseYou've already chosen the best response.5Part A: Says to factor to get the xintercepts. Did you factor yet?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0I think I did it wrong thats where I got a( (8, 320)

myininaya
 one year ago
Best ResponseYou've already chosen the best response.5(8,320) doesn't lay on the xaxis points that lay on the axis are points in the form (a,0) where a is any number notice the y is 0 that means we don't go up and or down from the xaxis and that we are actually on the xaxis The part of the graph that crosses the xaxis is called the xintercept. (You can have more than one) (8,320) does not have the y being 0 so it is definitely not on the xaxis

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Ok so how factor the function?

myininaya
 one year ago
Best ResponseYou've already chosen the best response.5I will copy what I said before: f(t)=at^2+bt+c if f is factorable, you should be able to find two integer numbers that when multiplied give you a product of a*c and a when added give you a product of b.

myininaya
 one year ago
Best ResponseYou've already chosen the best response.5Can you identify a,b, and c?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0a would be 16, b would be 32, and 384 is c, right?

myininaya
 one year ago
Best ResponseYou've already chosen the best response.5I think you had some negative numbers. I know they aren't all positive.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0sorry 16 and 32 were negative

myininaya
 one year ago
Best ResponseYou've already chosen the best response.5so a=16, b=32, and c=384 now recalling my quote from earlier: "f(t)=at^2+bt+c if f is factorable, you should be able to find two integer numbers that when multiplied give you a product of a*c and a when added give you a product of b. " We need to find what a*c is. Then we need to find two integer numbers that have product a*c and also have sum b.

myininaya
 one year ago
Best ResponseYou've already chosen the best response.5You could try to make life easier and see if 16, 32,384 have a common factor (greater than one)?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0ok Im trying to find that now. Ok hold on

myininaya
 one year ago
Best ResponseYou've already chosen the best response.5Though you could do this with the bigger numbers.

myininaya
 one year ago
Best ResponseYou've already chosen the best response.5cool so lets see what happens when we factor 16 out from 16t^232t+384

myininaya
 one year ago
Best ResponseYou've already chosen the best response.5\[16(\frac{16t^2}{16}\frac{32t}{16}+\frac{384}{16})\]

myininaya
 one year ago
Best ResponseYou've already chosen the best response.5so 16/16=? and 32/16=? and 384/16=?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.016/16=1 32/16=2 384/16=24

myininaya
 one year ago
Best ResponseYou've already chosen the best response.5so therefore you are saying we have \[16(t^2+2t24)\] Which I totally agree with So instead of looking at those really huge numbers let's reidentify what is a, b, and c We are now just looking at \[t^2+2t24\]

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0So that is the answer for A, but for the second part of the question how do I use that to interpret the xintercept.

myininaya
 one year ago
Best ResponseYou've already chosen the best response.5We aren't done factoring.

myininaya
 one year ago
Best ResponseYou've already chosen the best response.5I'm asking you to reidentify a,b,and c.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0oh ok sorry. as you may can tell math isnt my best subject

myininaya
 one year ago
Best ResponseYou've already chosen the best response.5we need to find a*c after. Then we need to find two factors of a*c that have product ac and sum b.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0a= t^2 b= 2t c= 24 right

myininaya
 one year ago
Best ResponseYou've already chosen the best response.5a,b, and c are the constant values that are in front of the variable squared, in front of the variable, and then lastly the constant not attach to a variable respectively in other words a is the coefficient of t^2 b is the coefficient of t c is the left over term (the constant term)

myininaya
 one year ago
Best ResponseYou've already chosen the best response.5we have at^2+bt+c and we are comparing this to t^2+2t24 now since 1*k=k for all k then 1*t^2=t^2 so you could say we are comparing at^2+bt+c to 1t^2+2t24 if you think that makes it easier

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Im so confused. wouldn't the factor be 16(t+1624)

myininaya
 one year ago
Best ResponseYou've already chosen the best response.5Where did you get 16(t+1624) I thought we had 16(t^2+2t24)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0I'm not sure. was trying to factor I think I just put the wrong number in.

myininaya
 one year ago
Best ResponseYou've already chosen the best response.5ok so we are looking at factoring t^2+2t24 which is the samething as saying 1t^2+2t24 what is a,b, and c? remember you are comparing 1t^2+2t24 to at^2+bt+c to determine what a,b, and c are.

myininaya
 one year ago
Best ResponseYou've already chosen the best response.5again a,b, and c are suppose to be constants c is right but a and b for some reason you are inputting the variable part

myininaya
 one year ago
Best ResponseYou've already chosen the best response.5a=1 b=2 c=24 now what is a*c

myininaya
 one year ago
Best ResponseYou've already chosen the best response.5ok so since a=1 we can use a shortcut to the factoring style mentioned earlier what are two numbers that multiplied to be 24 and add up to be 2?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0i thought that was a 7. Im lost again

myininaya
 one year ago
Best ResponseYou've already chosen the best response.5which one of these is true: 24+(1)=2 24+1=2 12+(2)=2 12+2=2 6+4=2 6+(4)=2 8+(3)=2 8+3=2

myininaya
 one year ago
Best ResponseYou've already chosen the best response.5can you tell what we were looking for?

myininaya
 one year ago
Best ResponseYou've already chosen the best response.5i actually told you what we were looking for.

myininaya
 one year ago
Best ResponseYou've already chosen the best response.5and where are you lost? I haven't see any 7's yet

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0it was the ? no 7 We were getting the b and c right

myininaya
 one year ago
Best ResponseYou've already chosen the best response.5My thing want copy and paste. But I asked you to find two numbers that multiplied to be 24 and add up to be 2? Can you tell me what two integer numbers do this?

myininaya
 one year ago
Best ResponseYou've already chosen the best response.5so again since a=1 we don't have to go through the longer process which requires factor by grouping so since a=1, t^2+2t24=(t+6)(t4) so we started with f(t)=16t^232t+384 and then we factor f and got f(t)=16(t+6)(t4)

myininaya
 one year ago
Best ResponseYou've already chosen the best response.5You may want to work on more factoring.

myininaya
 one year ago
Best ResponseYou've already chosen the best response.5So what are the xintercepts?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Yes I do. the 6 and 4 right

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0yes I do. the 6 and 4 right

myininaya
 one year ago
Best ResponseYou've already chosen the best response.54 is right but you should not have 6

myininaya
 one year ago
Best ResponseYou've already chosen the best response.5I already agreed with t=4 I don't agree with t=6 because 6+6 does not equal 0.

myininaya
 one year ago
Best ResponseYou've already chosen the best response.5right so the xintercepts of f(t)=16(t4)(t+6) are t=4 or t=6. Recall that anything that lays on the xaxis has the yvalue being 0. So the xintercepts in orderpair form are (4,0) or (6,0). Now what does t represent and what does y represent (or what does f(t) represent)? Refer to your problem for this. We are using this to interpret the xintercepts.

myininaya
 one year ago
Best ResponseYou've already chosen the best response.5which one is the height t or f(t)?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0the f and the t is time?

myininaya
 one year ago
Best ResponseYou've already chosen the best response.5right y=f(t) is the height t is the seconds Now I don't think we invented time travel yet and I think time travel would actually cause multiple dimensions (multiple possibilities) So I'm assuming time has to be 0 or greater that 0.

myininaya
 one year ago
Best ResponseYou've already chosen the best response.5So that means the one xintercept we found is not needed for this question. which one am I referring to?

myininaya
 one year ago
Best ResponseYou've already chosen the best response.5you mean the (6,0)?

myininaya
 one year ago
Best ResponseYou've already chosen the best response.5Ok so we only really have a graph for t>=0 or interval notation [0,infinity) So the only xintercept we have to determine is (4,0) since this point actually exists for t>=0.

myininaya
 one year ago
Best ResponseYou've already chosen the best response.5so do you know what (4,0) means?

myininaya
 one year ago
Best ResponseYou've already chosen the best response.5I will give you a hint. You already said t represented seconds And f(t) or y whichever one you want to call it represents height

myininaya
 one year ago
Best ResponseYou've already chosen the best response.5so use this to say in words what (4,0) means

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0It is 4 feet heigh at 0 secs

myininaya
 one year ago
Best ResponseYou've already chosen the best response.5why do you say that? do you think the point should be read (4,0) or (0,4) you are getting confused which is which

myininaya
 one year ago
Best ResponseYou've already chosen the best response.5we should really say tintercept when we say xintercept since there is no x's lol but anyways isn't it (t,y) not (y,t)?

myininaya
 one year ago
Best ResponseYou've already chosen the best response.5you said earlier t=4 now you are saying t=0

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0lol true. Yes t was first

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0So at 4 secs it was at 0 feet high

myininaya
 one year ago
Best ResponseYou've already chosen the best response.5So we are definitely not interpreting (0,4) I'm not even sure this point is on the graph unless I check it but that is unnecessary work. We are looking at (4,0). which says yes after 4 seconds, the sandbag is 0 ft from the ground (or on the ground).

myininaya
 one year ago
Best ResponseYou've already chosen the best response.5because you know if it has 0 distance from the ground then it is got to be on the ground right?

myininaya
 one year ago
Best ResponseYou've already chosen the best response.5ok Do you feel like you understand this problem better? Do you feel like if your teacher asked you to explain you would have the confidence to do so?

myininaya
 one year ago
Best ResponseYou've already chosen the best response.5Do you have any questions?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0I think so. But I am def looking into a tutor. lol

myininaya
 one year ago
Best ResponseYou've already chosen the best response.5You might want to try to work this problem without looking at what we did from the very beginning and see if you arrive at the same conclusions as we did.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0No questions. Thats a good idea. Thank you so very much for your help

myininaya
 one year ago
Best ResponseYou've already chosen the best response.5np You deserve a medal for putting in work and not giving up on the problem. I see so many people give up. It really is awesome to come across people like you who care to understand it. Thanks for trying super hard.

myininaya
 one year ago
Best ResponseYou've already chosen the best response.5Now I must return to my work. Good luck.
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