The answer is b to be sure

**Answer:**

C. Yes, the angle must be in between the two sides!

The discriminant of the equation

is 76.

I hope that helps.

**Answer:**

**Step-by-step explanation:**

For this case we can use the moment generating function for the normal model given by:

And this function is very useful when the distribution analyzed have exponentials and we can write the generating moment function can be write like this:

And we have that the moment generating function can be write like this:

And we can write this as an infinite series like this:

And since this series converges absolutely for all the possible values of tX as converges the series e^2, we can use this to write this expression:

and we can use the property that the convergent power series can be equal only if they are equal term by term and then we have:

And then we have this:

And then we can find the

And we can find the variance like this :

And first we find:

And then the variance is given by:

**Answer:**

d

**Step-by-step explanation:**