Answer: 4 seconds
Step-by-step explanation:
Given: The function
can be used to model the height of the ball where t is the time in seconds after the ball kicked and h(t) is the height in feet.
Differentiate the given function with respect to t , we get

Put h'(t)=0

Also, 
By second derivative test, h(t) is maximum at t=4.
Hence, the time in Devon which the ball reaches it maximum height = 4 seconds
8 and -8 cuz theyre both 8 in absolute form
I count 5. There could be more. Sorry. Don't have scratch paper at the moment.
The amount of money you have is $ 20864.521
<h3><u><em>
Solution:</em></u></h3>
Given that you invested $15,000 dollars for 11 years at 3% annual interest compounded continuously.
To find: total amount of money
<em><u>The compound interest formula for compounded continously is given as:</u></em>

Where "p" is the principal
"r" is the rate of interest
"t" is the number of years
Here in this problem, p = 15000
t = 11 years

<em><u>Substituting the values in formula we get,</u></em>

Thus the amount of money you have is $ 20864.521
Can you please write it out or take another pic? Key words are missing.