Answer:

Step-by-step explanation:
From the question we are told that:
Generally the equation if differentiated is mathematically given by

Where
y'=0

Factorizing,We have

Therefore
The critical points are

Answer:
5.8
Step-by-step explanation:
Y e s .
Using the Distance formula and all.
Answer:
B
Step-by-step explanation
the answer comes to
and 15 is the only answer below 20