I think it is 3.25%. That is what I had got when I had did my math
I think the Answer is 64 !!!
Answer:

Step-by-step explanation:
we have

where
t is the time in seconds
h is the dolphin's height in feet
we know that
When the dolphin return to the water the value of h(t) is equal to zero
so
For h(t)=0


Simplify



see the attached figure to better understand the problem
-2 and -4
Hope this helps!
Answer:
The second one.
Step-by-step explanation:
Because adding x by anything is 0 since you dont have any other numbers.