Answer:
id say it is 5ft
Step-by-step explanation:
Answer:

Step-by-step explanation:
We are given with Second-order derivative of function f(x).

We need to find Third-order derivative of the function f(x).

We know that,
f'''(x) = (f''(x))'
So,







Therefore, 
Answer:
the first one is correct ive T a k e n this testing.
Step-by-step explanation: