MrNebula
  • MrNebula
Please explain how I can use math to solve the problem. Sarah drops a penny from a height of 1250 feet. I will be using h for height and t for time in seconds, this will be modeled in the function h = -16t^2 + 1250. How will it take for Sarah’s penny to reach the ground? How I would do it is get this "Sarah" to drop the penny again so I can just count how long it takes. But I have to use "Math" to solve it. How do I use "Math" to solve it? Explain, PLEASE NO DIRECT ANSWER I WANT TO LEARN
Algebra
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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geekfromthefutur
  • geekfromthefutur
Hey how are you?
MrNebula
  • MrNebula
Not good, I really need help
geekfromthefutur
  • geekfromthefutur
Ok, well im here to help ya. So you can get this nasty math problem out of the way sound good?

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MrNebula
  • MrNebula
Yes after I read what you said I nearly cried :D
geekfromthefutur
  • geekfromthefutur
Lol
geekfromthefutur
  • geekfromthefutur
Just to let you know im looking over your problem and getting all the facts.
MrNebula
  • MrNebula
I know im letting you take your time if you dont understand what its asking let me know
MrNebula
  • MrNebula
I need the formula to the answer explained
geekfromthefutur
  • geekfromthefutur
Nah i get it now.
MrNebula
  • MrNebula
K
geekfromthefutur
  • geekfromthefutur
First, we are going to have to multiply 16 ^2
MrNebula
  • MrNebula
With what?
geekfromthefutur
  • geekfromthefutur
Thats it we have to solve 16^2. You know how if noti will show you how.
geekfromthefutur
  • geekfromthefutur
its a step to solving the equation
MrNebula
  • MrNebula
I know that the ^2 is the square root right?
geekfromthefutur
  • geekfromthefutur
Correct
MrNebula
  • MrNebula
So do you 16 * 2 thats easy
geekfromthefutur
  • geekfromthefutur
K what did u get
MrNebula
  • MrNebula
Easy 32
geekfromthefutur
  • geekfromthefutur
ok do it with a negative -16
MrNebula
  • MrNebula
Um - 32
geekfromthefutur
  • geekfromthefutur
Lol correct
MrNebula
  • MrNebula
Hehe
geekfromthefutur
  • geekfromthefutur
Ok so now we have to do this -32t + 1250 now solve that
MrNebula
  • MrNebula
1218t right?
MrNebula
  • MrNebula
Why do we have t all the sudden?
geekfromthefutur
  • geekfromthefutur
the t has been there lol h = -16t^2 + 1250.
geekfromthefutur
  • geekfromthefutur
and you are correct
MrNebula
  • MrNebula
I know that but why are we multiplying it with 1218t?
MrNebula
  • MrNebula
1218*
geekfromthefutur
  • geekfromthefutur
Ok and i already asked my friend @Thesmarterone to help
MrNebula
  • MrNebula
Oh I see because it was with the 16
MrNebula
  • MrNebula
Ok
geekfromthefutur
  • geekfromthefutur
If he dont come ill help
MrNebula
  • MrNebula
If he does will he replace you?
geekfromthefutur
  • geekfromthefutur
Actually I messed up lol xD it is 32 seconds it takes to fall to cut it short
MrNebula
  • MrNebula
To cut it short?
geekfromthefutur
  • geekfromthefutur
well ik i messed up
MrNebula
  • MrNebula
Ok im kinda lots with that, but restart then?
geekfromthefutur
  • geekfromthefutur
lemme c if i can get some1 in here if not we will work together again lol sorry this turned into a long problem
MrNebula
  • MrNebula
Its ok man I got all day if we need to
MrNebula
  • MrNebula
This problem may save my butt in school so I dont care how long it takes
geekfromthefutur
  • geekfromthefutur
@ganeshie8 @just_one_last_goodbye
geekfromthefutur
  • geekfromthefutur
Ok here: http://www.wolframalpha.com/input/?i=Sarah+drops+a+penny+from+a+height+of+1250+feet.+I+will+be+using+h+for+height+and+t+for+time+in+seconds%2C+this+will+be+modeled+in+the+function+h+%3D+-16t%5E2+%2B+1250.+How+will+it+take+for+Sarah%E2%80%99s+penny+to+re
geekfromthefutur
  • geekfromthefutur
What school is this?
MrNebula
  • MrNebula
Wow wolframalph can do that! dang...
MrNebula
  • MrNebula
Oh connections
geekfromthefutur
  • geekfromthefutur
i do flvs and yea that should help
MrNebula
  • MrNebula
Hi Captain America
MrNebula
  • MrNebula
Well I can use the graph to show some extra data...
geekfromthefutur
  • geekfromthefutur
Hey last idk if you could help or not
MrNebula
  • MrNebula
I still will need to show how I came up with the answer and I dont want it as a "direct answer"
geekfromthefutur
  • geekfromthefutur
Tru
MrNebula
  • MrNebula
Still need step by step explination
geekfromthefutur
  • geekfromthefutur
Ok well lets see first you mutiply -16 x 2 and you get -32t
MrNebula
  • MrNebula
Ya
geekfromthefutur
  • geekfromthefutur
So then, The total seconds it fallen was 32 seconds. Because when you mutiply 16*2 it will give u -32 and with the 1250 it was already part of the problem so the only thing needed to be done was mutiplication and solving 16*2
MrNebula
  • MrNebula
Oh ok
geekfromthefutur
  • geekfromthefutur
Good?
MrNebula
  • MrNebula
Ya so t is -32?
MrNebula
  • MrNebula
Or just 32?
geekfromthefutur
  • geekfromthefutur
T IS 32 lol sry caps
MrNebula
  • MrNebula
So 32 per feet?
MrNebula
  • MrNebula
That is slow falling that cant be right
geekfromthefutur
  • geekfromthefutur
@satellite73 Is this correct
MrNebula
  • MrNebula
Well I guess with the wind pushing the penny up making the fall slower
MrNebula
  • MrNebula
if it is correct then all I have to do is times 32 by 1250 that will give me how much time it takes from top to bottom
geekfromthefutur
  • geekfromthefutur
THATS WHAT I FORGOT TO DO DA* IM DUM
MrNebula
  • MrNebula
Wait you didn't think to times 32 by 1250?
geekfromthefutur
  • geekfromthefutur
No because it you mutiplied it would be to high of a nimber so we have to divide the time
MrNebula
  • MrNebula
Ok... If you say so. Go on
geekfromthefutur
  • geekfromthefutur
So now how would u do it 32/1250 or 1250/32?
MrNebula
  • MrNebula
32/1250 would be way to small of a number but why would we 1250/32
geekfromthefutur
  • geekfromthefutur
Exactly and what would we get and sorry the site got closed down
MrNebula
  • MrNebula
I didn't notice anything and we would get 39.06
geekfromthefutur
  • geekfromthefutur
Correct
geekfromthefutur
  • geekfromthefutur
So thats what it would be
MrNebula
  • MrNebula
Thats what t is?
geekfromthefutur
  • geekfromthefutur
Yes ik im right
MrNebula
  • MrNebula
K so now we times that by 1250 to find the total time from top to bottom
MrNebula
  • MrNebula
= 48828.125
geekfromthefutur
  • geekfromthefutur
OK
geekfromthefutur
  • geekfromthefutur
Now what do you think?
MrNebula
  • MrNebula
I think that t = 39. and the total time from top to bottom is 48828
geekfromthefutur
  • geekfromthefutur
Awesome^-^
MrNebula
  • MrNebula
Thanks I just need to put this down in steps and explain it step by step!
MrNebula
  • MrNebula
THANK YOU
MrNebula
  • MrNebula
Ill let you know what my teacher says about it so we can both be corrected if there is a issue
MrNebula
  • MrNebula
But we should be good ;)

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