# Zero Routine?

• Apr 5th 2007, 05:57 PM
Mathfailure
Zero Routine?
I think I may just be confused on the "zero Routine" wording, but this problem reads "The height of the ball is given by the function -16t^2-32t+229 solve using the Zero routine on your TI-83 calculator." What exactly is the Zero Routine? Thanks!!!! and How would I apply it to this function. Thanks!!
• Apr 5th 2007, 08:06 PM
ThePerfectHacker
Quote:

Originally Posted by Mathfailure
I think I may just be confused on the "zero Routine" wording, but this problem reads "The height of the ball is given by the function -16t^2-32t+229 solve using the Zero routine on your TI-83 calculator." What exactly is the Zero Routine? Thanks!!!! and How would I apply it to this function. Thanks!!

Maybe it means finding the zeros.

1)Graph y=-16x^2-32x+229
2)Gaze upon the graph.
3)Find the x-intercepts (place where it intersecpts the x-axis).
4)Reject negative values.
5)The remaining positive value is the zero.
6)That is amount of time for it to come down.
• Apr 5th 2007, 08:20 PM
Mathfailure
Quote:

Originally Posted by ThePerfectHacker
Maybe it means finding the zeros.

1)Graph y=-16x^2-32x+229
2)Gaze upon the graph.
3)Find the x-intercepts (place where it intersecpts the x-axis).
4)Reject negative values.
5)The remaining positive value is the zero.
6)That is amount of time for it to come down.

Thanks!!! I think that is exactly what he means.
• Apr 6th 2007, 01:56 AM
earboth
Quote:

Originally Posted by Mathfailure
I think I may just be confused on the "zero Routine" wording, but this problem reads "The height of the ball is given by the function -16t^2-32t+229 solve using the Zero routine on your TI-83 calculator." What exactly is the Zero Routine? Thanks!!!! and How would I apply it to this function. Thanks!!

Hello,

1. write the term of the function at Y1=
2. graph the function by pressing the GRAPH-button
3. normally you will not see very much so press ZOOM-button and choose 0:ZoomFit
4. press 2ND+TRACE (it's the command CALC)
5. choose for 2:zero
6. you will be prompted to give in a left and a right bound which you can do with the cursor. Be sure that the cursor crosses the x-axis
7. type in a guess (with your problem -5 will do fine)
8. you'll get the nearest zero

EB

PS: I used a TI84 but I believe (and hope) the syntax is similar to a TI83