Answer:6
Step-by-step explanation:
There are three things you have to know:
- A function is convex when its second derivative

- A function is concave when it second derivative

- The derivative of a power,
, is 
So, the first derivative is

and the second derivative is

This implies that the second derivative of a parabola is constant, and of course that 2 doesn't change the sign of
.
Answer:
D
Step-by-step explanation:
Answer:
193.2
Step-by-step explanation:
27.6x7 
The first and third option.
Hope this helps.