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Mathematics 10 Online
kaylak:

calc help please

kaylak:

@Shadow

2 attachments
kaylak:

@Shadow

jhonyy9:

you know the function h so you need calcule the h(1) = ? just substitute the 1 in plcae of t inside this quadratic

jhonyy9:

@kaylak

jhonyy9:

in place of t

jhonyy9:

and so will get the speed of the ball at t=1 hope helped for the first one

kaylak:

is it a

jhonyy9:

no

jhonyy9:

please write here your calcule

jhonyy9:

h(t)= -16t^2 +40t +6 h(1) = ?

kaylak:

-16(1)^2=-16 +40+6

kaylak:

is it c then

jhonyy9:

yes so -16+40 = 30 yes sure c is right

kaylak:

30 or is there more to the method

kaylak:

this is calculus

kaylak:

what about 2?

jhonyy9:

30 is the right answer

kaylak:

what about 2?

sillybilly123:

@kaylak you need to know that @jhonyy9 is a troll, armed with a little knowledge and a sub-par sense of humor. that \(h(t)\) function gives you the height of the ball above some base line after time = t for speed <--- a scalar, you need to differentiate and know that the absolute value is what matters: \(speed = \left|\dfrac{dh}{dt}\right|_{t = 1}\) this is the @jhonyy9 joke BTW, but it's really very dated: https://www.youtube.com/watch?v=9kpBzUQHYtM

kaylak:

so c is wrong?

kaylak:

could you help me with all my problems then?

sillybilly123:

i am assuming that you can differentiate this -- wrt t then ask what that derivative gives you at t = 1 for the second question, negative-invert the slope .... or open a new thread because you will find the answer here ... if Jay actually grows a Brain !!!!!

sillybilly123:

what is \(\dfrac{dh}{dt}\)??

sillybilly123:

|dw:1537220855976:dw|

kaylak:

i said a at first but he said it was wrong

sillybilly123:

\(\color{#0cbb34}{\text{Originally Posted by}}\) @sillybilly123 what is \(\dfrac{dh}{dt}\)?? \(\color{#0cbb34}{\text{End of Quote}}\)

kaylak:

what is d ?

kaylak:

h(t) i know that and t is 1

sillybilly123:

so that gives you the height of the ball

kaylak:

but what is d ?

sillybilly123:

d?? what do you mean by d ??

kaylak:

\(\color{#0cbb34}{\text{Originally Posted by}}\) @sillybilly123 \(\color{#0cbb34}{\text{Originally Posted by}}\) @sillybilly123 what is \(\dfrac{dh}{dt}\)?? \(\color{#0cbb34}{\text{End of Quote}}\) \(\color{#0cbb34}{\text{End of Quote}}\)

sillybilly123:

Classic! yer learning Calculus, right?

kaylak:

@Vocaloid yay you're here

kaylak:

yes lol

sillybilly123:

Are you learning online?? That usually means you are learning nothing :(

kaylak:

I'm virtual school so yes

sillybilly123:

Oh Sauce. I apologize

kaylak:

please help me figure out these questions

sillybilly123:

so if you get really interested in a subject, where do you go?

sillybilly123:

like, no real teachers, so the internet?

kaylak:

lol It's hs lol I'm going to a real college when I graduate

kaylak:

's for people who want to work in advanced or need to work on their own pace

kaylak:

can you please just focus on the work been waiting for 4 hours

kaylak:

@sillybilly123 @Vocaloid

kaylak:

@Zarkon

kaylak:

is the 1st pic a or what? I'm lost

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