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Hi

Hi, can you please help me with this question?

I think some could be done

how far have u gone?

Lets start from the very last question (f)

What is the height when it touches the ground

I haven't started it because i don't understand what to do...
Why can't we start from part a) ?

And go in order?

ok...Lets start with a)

|dw:1442180642592:dw| Do you understand how that happened

yes because you put it in function notation

yes....so lets go to the next one

so it's in the second degree therefore it is what?

@diamondboy quadratic

good

wat do u think abt question d and f

@diamondboy How do you make a graph for {tER | t > 0} in part d?

If I could figure out what the tER meant?

{TER | T > 0}
TER = any real number

Ok

yes

|dw:1442183048636:dw|

@diamondboy like that? ^

yes

is that good?

|dw:1442183871319:dw|

@diamondboy all of the 2nd differences are constant. they add up to -9.8. That makes it quadratic

How do i graph it ?

You simply|dw:1442184273390:dw|

|dw:1442184408996:dw|

my line isn't perfect but something like that, right?

|dw:1442184387663:dw|

something like that but you should have a curve

is this a calc 1 class

so its at its highest point at 3 seconds
or f(3)= 29.4 (3) - 4.9 (3)^2
in function notation ?

This is 11th Grade Functions (i'm from Canada)

ok

hmmm...the reason I asked is I wanted to use the first derivative to find the maximum height

and the ball is at the ground at 0
f(0) = 29.4 (0) -4.9(0)^2

Oh i don't remember learning about first derivatives

well yes you could do the last one like that or equate d equation to 0

alright so... h(3)= 29.4 (3) - 4.9 (3)^2

how do you equate the equation to 0?

|dw:1442184935394:dw|

you see that?

oh okay, you evaluated it....

Alright, well thank you so much for helping me!

Thank God

Moreover you also did a great job

thanks

Thank God... :)