For
ax^2+bx+c
the axis of symmetry is -b/2a
first one
-3/2=3, nope
2nd one
3/2=3? nope
3rd one
-6/2=3? nope
fourth
6/2=3? yes
answer is last one or
f(x)=x^2-6x-1
The final amount in the account after 25 years is $24670.42.
<h3>
How do you calculate the final Amount after 25 Years?</h3>
Given that 3400 dollars are placed in an account with an annual interest rate of 8.25% for 25 years.
The final amount in the account is calculated by the formula given below.

Where A is the final amount, P is the initial principal balance, R is the interest rate, T is the time period.
The final amount is given below.



Hence we can conclude that the final amount in the account after 25 years is $24670.42.
To know more about the compound interest, follow the link given below.
brainly.com/question/25857212.
Answer: well the thing is 12, i have no idea how to do it though. sorry
Step-by-step explanation:
Solving
we get 
Step-by-step explanation:
We need to find the value of a. We are given:

Solving:

So, Solving
we get 
Keywords: Solving Expressions
Learn more about Solving Expressions at:
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Answer:
4600
Step-by-step explanation: