Question

Algebra 2 PLEASE HELP

Answer 1

A ball is thrown vertically upward. After t seconds, its height h (in feet) is given by the function
h(t)=88t-16t^2
What is the maximum height that the ball will reach?
Do not round your answer.

Answer 2

first u need to differentiate the function with respect to \(t\) and equate it to \(0\)

Answer 3

???????

Answer 4

what?

Answer 5

@mathmate

Answer 6

https://www.desmos.com/calculator/ql9vcs7oi1

Answer 7

@mathgirl2012
I think you know how to find h'(t).
Can you show what h'(t) is?

Answer 8

I just want as many people as possible to help me

Answer 9

I am completely lost?

Answer 10

@mathmate

Answer 11

@mathgirl2012
It is normal that you will get lost when multiple persons are helping you at the same time.
It is ok to tag 2 or 3 people at the same time at the beginning. But refrain from doing so once someone starts helping you.
By calling 5 other people \(while\) someone is helping you is a little insulting.
You will lose your help, and perhaps others will lose interest in helping you in the future.

Answer 12

sorry @mathmate

Answer 13

@mathgirl2012
no problem for me. In correct etiquette, I should not even have posted when I see that others are helping you.
However, I \(seemed\) to have detected a misunderstanding, that's why I intervened.

Since others have lost interest in helping you, would you like to go back to your question?

Answer 14

@mathmate can I ask you to come and help me on my next question

Answer 15

@mathgirl2012
You're welcome to tag a couple of people, but try to avoid doing that when someone starts to help you, ok?

Answer 16

To refresh my memory, can you tell me what have you done so far in algebra 2?

Answer 17

* ...what you have done...

Answer 18

@mathgirl2012 are you there?

Answer 19

@mathgirl2012
Have you done completing the square?

Answer 20

yes

Answer 21

So if the maximum/minimum is at (3,3)
Do you have a value for h in the general equation
\(f(x)=a(x-h)^2+k\)

Answer 22

@mathgirl2012
See if you can find the values of (h,k) which define the vertex.
We can then use the point (5,-5) to find the value of a.