weaks4_7

=Ms. Weaks Period 4= =Group 7 - Cobrethy_Algebra4ever= Samantha A. Daniela G. Luul L.

= = =A gymnast dismounts the uneven parallel bars at a height of 8 feet with an initial upward velocity of 8 feet per second. How many seconds will take him to reach the ground?=

= = =**Part I- The Word Problem**=

= = =Part II- The Parabola=

3- C represents the Y-intercept. In this case it is positive so the graph shifts up to eight.
4- The Discriminant: We calculated this to find the roots. Since 576 is positive, this tells us that the parabola will have two roots.

[[image:COBRETHY_Discriminant.png width="321" height="287"]]
= = =Part III- The Math=

====When we graph the parabola first we plot the axis of symmetry. This is the center point of the parabola (0.25,9). If the parabola is folded in half along this line, both sides will be exactly the same. The vertex lies on the line of symmetry. The root is where the parabola meets the x-axis. A parabola can have either no roots, one root. or two roots. The y-intercept is where the parabola meets the y-intercept.====

====The best way to solve for x is using the quadratic formula because we have three terms in our equation. We don't complete the square because B isn't odd and the Quadratic Formula is the easiest way to solve it.====

Our answers are the same as the roots on the graph: (-0.5 & 1)
=Part IV- The Solution and Meaning=

5- The gymnast is in the air for one second because she dismounts at 8 ft/s at an initial height of 8 feet.
=Part V- The Reflection=

Dani Green(:user:farbdgarciaIn the process of completing our wiki project, we found it difficult to find a way to write the equation in the standard form. Next time something i would do different is organize our work and assign parts to the different member using more group work techniques. the project did help me understand the quadratic equation because i had to use the quadratic formula and it was practice. Before i wasn't sure how to completely solve using the formula. It felt different to act as if i was a teacher because we had to make the work understandable to those who are new to solving height/velocity problems.

Luuuuuuul (:- - - We found it difficult to put the equation in standard form and to understand how the parabola was similar to the equation. To make the project better next time I would make all the work look neater so all the formulas are easier to understand. The project didn't help me understand the quadratic formula because it was really confusing to me and I had lots of trouble with it.

Samanthaaaaaaaaa (- - - *The wiki project was kind of difficult, i was lost at the beginning of the project but then i got caught up. Maybe next time we could have seperate papers for different sets of work to be organized. project helped me understand the quadratic equation better then the understanding i had before. (: