Are none of these correct?
http://gyazo.com/745606c90f816ad7775f92bf3322c9bb

Question

Are none of these correct?
http://gyazo.com/745606c90f816ad7775f92bf3322c9bb

lukecrayonz · Answer

@Psymon

psymon · Answer

Nah, one of them is correct.

lukecrayonz · Answer

B

psymon · Answer

Right.

lukecrayonz · Answer

Got it for some reason it was a little off on my calculator and looked weird.

psymon · Answer

I see, lol. Yeah, they wanted y-values, so little funky even when I looked at it. Whatever xD

lukecrayonz · Answer

What about this question? http://gyazo.com/24acbbe0522ad0b54adb144787a69772

psymon · Answer

Well thats a bit ridiculous

lukecrayonz · Answer

How so?:O I just don't know how to do it.

psymon · Answer

Just the numbers xDD No need to have friggin billionths and trillionths place decimals xD

lukecrayonz · Answer

Am I supposed to find the maximum, then input that into the equation to find the year..?

psymon · Answer

But nah, nothing new. But yeah, find the maximum, so derivative, set equal to 0

lukecrayonz · Answer

Lol I just use my calculators maximum and minimum :(

lukecrayonz · Answer

Is that bad?

psymon · Answer

Should learn to do it yourself, lol

lukecrayonz · Answer

How do I? Find the derivative and set it equal to zero then thats it? solve for the variable and then I get my maximum?

psymon · Answer

Right. You may get more than one value when you set the derivative to 0, so itd be up to you to test all your values into the ORIGINAL function, and see which is highest.

lukecrayonz · Answer

And what about minimum?

lukecrayonz · Answer

2.8184 at t=71.6973

psymon · Answer

Same thing. for example, you set derivative to 0 and get t = 1 and 2. Plug them both into the original equation. Highest answer is max, lowest answer is minimum. If you only get one answer for t in the derivative, its up to you to determine if the point is a max or min, usually by using end behavior and knowledge of graphs.

lukecrayonz · Answer

Gotcha:)

psymon · Answer

Yep, sounds good for the max. So t is 71.6973. Add that to 1910 to find the year.

lukecrayonz · Answer

1982?

psymon · Answer

Yeah, if you round :3

lukecrayonz · Answer

Yes for the years:O But it said round down so its 1981. So what about for the 2003 and 2010?

psymon · Answer

Plug in t = 93 into the original first.

lukecrayonz · Answer

Got ti atll, thanks man.

psymon · Answer

Alright, awesome :3