Question 3, @satellite73 this one has 4 parts so it might be a little longer, if you need to go or want to finish tomorrow just let me know i wont mind (: thanks for all your help today btw

Question

anonymous · Answer

lets take a look

anonymous · Answer

first part is real easy
replace $s$ by $96$ and $v$ by $80$ and get 
$$H(t)=-16t^2+80t+96$$

anonymous · Answer

second part is also easy
the vertex is where the first coordinate is $-\frac{b}{2a}$ which in our case is $-\frac{80}{2\times (-16)}=\frac{5}{2}$

anonymous · Answer

or if you prefer decimals $2.5$

anonymous · Answer

then the maximum height will be $$H(2.5)=-16\times (2.5)^2+80\times (2.5)+96$$ which you compute using a calculator

anonymous · Answer

i get this http://www.wolframalpha.com/input/?i=-16%282.5%29^2%2B80*2.5%2B96

anonymous · Answer

I am sorry had to go to the bathroom give me a second to catch up (:

anonymous · Answer

take your time

anonymous · Answer

Okay, read it all and wow yeah part A was easy lol how did i not see that

anonymous · Answer

part B i hope you get, if didn't leave out any steps

anonymous · Answer

yes i understood that too dont worry (:

anonymous · Answer

plus i used a calculator, so i know the answer is right

anonymous · Answer

C want you to do 
$$-16t^2+80t+96=31+32.2t$$

anonymous · Answer

it says use a table, i would use this http://www.wolframalpha.com/input/?i=-16t^2%2B80t%2B96%3D31%2B32.2t

anonymous · Answer

ignore the negative solution because time does not go backwards
round and say it is at about $t=4$

anonymous · Answer

or you could just plug in 4 and say it is close

anonymous · Answer

okay yeah thanks, anyway if you were to round the answer it would be a 4 right? (:

anonymous · Answer

yes

anonymous · Answer

and finally D is also easy
it goes up until time is $2.5$ because that was the first coordinate of the vertex
since $4>2.5$ it is on the way DOWN

anonymous · Answer

Okay, thank you soooo much (: <3

anonymous · Answer

yw
you owe me a beer
good luck!

anonymous · Answer

when im old enough to get one then you will get your beer :P

anonymous · Answer

oops
i will settle for a root beer

anonymous · Answer

lol xD well anyway thanks a bunch this really means a lot considering i have eoc exam on monday and now i can take it since you helped me with this, all i need to do now is go back and write down the answers, so yeah thanks xoxo

anonymous · Answer

yw
good luck
don't study too late

anonymous · Answer

thank you and haha will do (: