Question

Imagine you and your partner are fountain designers and you need to know how different speed motors will affect the water’s projected height and time in the air. You have various motor speed options but need to choose the one that most closely meets the client’s height request of 690 feet. Your job is to determine which motor speed is the best choice. You will determine the speed of two of the motors and your partner will do the same for the other two motors. In all cases, you will use the projectile formula y = –16x2 + vx + s, with startin

Answer 1

I got this Choreographed Fountains Activity: Collaborative Work

Imagine you and your partner are fountain designers and you need to know how different speed motors will affect the water’s projected height and time in the air. You have various motor speed options but need to choose the one that most closely meets the client’s height request of 690 feet. Your job is to determine which motor speed is the best choice. You will determine the speed of two of the motors and your partner will do the same for the other two motors. In all cases, you will use the projectile formula y = –16x2 + vx + s, with starting height of 0 (s = 0). Make sure that you and your partner complete equal amounts of this activity.

1. Substitute the data provided for speed (v) and starting heights (s) into their proper positions in the formula
y = –16x2 + vx + s and write the equation corresponding with each motor in the space provided below.
Then identify the a, b, and c values for each where indicated. (4 points total, 1 point each)
The equation for motor A is: y = –16x2 + 190x + 0
a =-16
b =190
c =690

The equation for motor B is: y = –16x2 + 210x + 0
a = -16
b = 210
c = 690

The equation for motor C is: y = –16x2 + 210x + 0

a =-16
b =230
c =690

The equation for motor D is: y = –16x2 + 210x + 0

a =-16
b = 250
c =690

Answer 2

I don't get how to graph it I entered the formula into the input and it's just two lines

Answer 3

610 = –16x^2 + 190x plot
610= –16x^2 + 210x plot
610= –16x^2 + 250x plot

Answer 4

are those suppose to be just lines

Answer 5

yup

Answer 6

another girl i helped on yahoo had some of the same problems look at this

Answer 7

oh how do I find the vertex though

Answer 8

http://answers.yahoo.com/question/index?qid=20110804181146AAwM4z6

Answer 9

heres how you find the vertex

Answer 10

you type in y = -16x^2 + 230x for motor C

Answer 11

http://www.purplemath.com/modules/sqrvertx.htm

Answer 12

I got this graph

Answer 13

and y = -16x^2 + 250x for motor D

Answer 14

woah... um let me c im not sure i have to do some research