Question

Based on the best-fit quadratic model at what time T will the height of the object be approximately 30 meters?
A.) 5.6 seconds
B.) 5.5seconds
C.)6.0 seconds
D.)5.4 seconds
*sn the picture is there when you click on the problem. please help thanks :)36 minutes ago

Answer 1

height = at^2+bt+c.
substitute any three values of height and t to find a,b,c. and then use those values to find out t for height = 30 meters

Answer 2

so would it be C

Answer 3

wait, this is best fitting. hmmm. I think you have to follow a different procedure for this.

Answer 4

so what would it be?

Answer 5

have you done derivatives?

Answer 6

no idk how sorry

Answer 7

Have you done curve fitting?

Answer 8

no

Answer 9

no

Answer 10

If you havent, then the best thing would be to use the method I described. use t = 0 , 2 ,4

Answer 11

okay so its B

Answer 12

are you getting different values of a,b,c if you are choosing different heights and t?

Answer 13

i really dont understand

Answer 14

http://www.youtube.com/watch?v=z_hEVWSkQHo

see that video. It explains it well. You can do the problem just like he explains it.

Answer 15

okay my friend just told me it was A?

Answer 16

and thanks for the video:)

Answer 17

you are welcome.

Answer 18

but is it A?

Answer 19

I don't know. you have to use your calculator.

Answer 20

see the video for more information;

Answer 21

okay