# Math Help - Zero Routine?

1. ## 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!!

2. 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.

3. 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.

4. 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