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Re: Math homework help pls

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thetommygun is not online. thetommygun
Joined: 21 Mar 2011
Total Posts: 6159
08 Dec 2014 09:44 PM
What is the maximum height of this function?

y=-16t^2+64t+5


Please explain
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brian987987 is not online. brian987987
Joined: 16 Feb 2010
Total Posts: 29009
08 Dec 2014 09:44 PM
21
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ImNinja101 is not online. ImNinja101
Joined: 18 Jun 2011
Total Posts: 8283
08 Dec 2014 09:45 PM
should be like


70 or something
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Verodoxys is not online. Verodoxys
Joined: 29 Jun 2012
Total Posts: 18454
08 Dec 2014 09:46 PM
uhm what

Veroastrianism - The One True Path™
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thetommygun is not online. thetommygun
Joined: 21 Mar 2011
Total Posts: 6159
08 Dec 2014 09:46 PM
After how many seconds?
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ImNinja101 is not online. ImNinja101
Joined: 18 Jun 2011
Total Posts: 8283
08 Dec 2014 09:47 PM
2
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ImNinja101 is not online. ImNinja101
Joined: 18 Jun 2011
Total Posts: 8283
08 Dec 2014 09:48 PM
69 for 2 seconds
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thetommygun is not online. thetommygun
Joined: 21 Mar 2011
Total Posts: 6159
08 Dec 2014 09:51 PM
explain!?
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thetommygun is not online. thetommygun
Joined: 21 Mar 2011
Total Posts: 6159
08 Dec 2014 09:54 PM
is anyone home
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Glerax is not online. Glerax
Joined: 13 Feb 2012
Total Posts: 16552
08 Dec 2014 09:55 PM
Er

Insert into graphing calculator

>calculate max

>enter max on your paper

>answer

Glerax says ~ FC and C&G's Prophet
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thetommygun is not online. thetommygun
Joined: 21 Mar 2011
Total Posts: 6159
08 Dec 2014 09:57 PM
but I need to know how to do it
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Glerax is not online. Glerax
Joined: 13 Feb 2012
Total Posts: 16552
08 Dec 2014 09:59 PM
Go to your Ti calculator

Click y= on the top left of the calc

enter that equation into y1

then click zoom, and press the number 6

you see the "trace" button? Click 2nd (should be around the y= button), and then click trace

scroll down to where it says maximum, and click it

then, click to the left of where you think the max is (tallest area)

then, click to the right of where you think the max is

then, click in place

it'll tell you max value

Glerax says ~ FC and C&G's Prophet
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thetommygun is not online. thetommygun
Joined: 21 Mar 2011
Total Posts: 6159
08 Dec 2014 10:02 PM
but I need to know how to do it on paper
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Glerax is not online. Glerax
Joined: 13 Feb 2012
Total Posts: 16552
08 Dec 2014 10:04 PM
don't knowwwww

max might be vertex

find vertex form

google it

pay attention in class

idk

Glerax says ~ FC and C&G's Prophet
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Preadeator123 is not online. Preadeator123
Joined: 01 Oct 2010
Total Posts: 3107
08 Dec 2014 10:07 PM
So um

y=-16t^2+64t+5

it's t squared right

so just find a way to combine that and 64t

then graph

plenty of google stuff just find it

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SirBackspace is not online. SirBackspace
Joined: 28 Mar 2010
Total Posts: 15427
08 Dec 2014 10:08 PM
y=-16t^2+64t+5

x of vertex = -b/2a

-64/32= -2

y of vertex= -16(-2)^2+64(-2)+5

-16(-4)-156+5

64 - 156 + 5 = -87

max is -87

or maybe not

that sounds wrong



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lionguy3 is not online. lionguy3
Joined: 13 Aug 2010
Total Posts: 722
08 Dec 2014 10:10 PM
you just factor it
if you can't do that, use the quadratic formula
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lndistinctly is not online. lndistinctly
Joined: 03 Oct 2009
Total Posts: 8552
08 Dec 2014 10:10 PM
if you help me w physics
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thetommygun is not online. thetommygun
Joined: 21 Mar 2011
Total Posts: 6159
08 Dec 2014 10:17 PM
AHHHHH
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IntenseSnows is not online. IntenseSnows
Joined: 12 Mar 2011
Total Posts: 13345
08 Dec 2014 10:20 PM
i believe it's 69 but i'm running off no sleep so don't trust me
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EmperorAsianK is not online. EmperorAsianK
Joined: 23 Oct 2013
Total Posts: 20098
08 Dec 2014 10:21 PM
y=-16t^2+64t+5

you derive it u nub

y'=-32t+64

set equal to 0

0=-32t+64

-64=-32t

t=2

at 2 seconds it reaches max height

plug it in original

y=-16(2)^2+64(2)+5

y=-64+128+5

y=64+5

y=69

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EmperorAsianK is not online. EmperorAsianK
Joined: 23 Oct 2013
Total Posts: 20098
08 Dec 2014 10:22 PM
always let the asians handle the math problems

stupid
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Warriorlord22 is not online. Warriorlord22
Joined: 10 Apr 2010
Total Posts: 3014
08 Dec 2014 10:23 PM
21
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Sparing is not online. Sparing
Joined: 12 Jul 2011
Total Posts: 4254
08 Dec 2014 10:23 PM
u sure u cant use ur graphing calc?
that's the only way i know how to do it, graph it and then just find Max

or you could just graph it with an x/y table and kind of estimate it..
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Zebv is not online. Zebv
Joined: 07 Apr 2014
Total Posts: 4140
08 Dec 2014 10:23 PM
XD
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