Answer:
C. It has four congruent angles.
Step-by-step explanation:
The Lagrangian is

with critical points where the partial derivatives vanish.



Substitute
into the last equation and solve for
:

Then we get two critical points,

We get an absolute maximum of
at the second point, and an absolute minimum of
at the first point.
We know that we need to bake 6 pound for 138 minutes, then we have the proportion:

Let x be the time we need to bake the 3 pound roast, in this case we have the proportion:

By equating both ratios we have the proportion:

Now, by simplifying the right side of the proportion we have that:

For this proportion to be equal we need that x=69, therefore we need to cook the 3 pound roast for 69 minutes.
It would be 3.25 because you can’t round 0.001 up
The answer is: 3
Explanation: there’s a number pattern going on, in the first example they subtract by 3 each time. In the second example they subtract by 2 each time. So for the last one you have to do 9-6 which is 3 and that’s the number pattern.
Hope I helped :)