Given z^2=1/2(cos(2pi/5)+i sin(2pi/5)), which lettered point represents z?

is represented by point A.

Step-by-step explanation:

According to the De Moivre's Formula, the power of a complex number of the form is defined by this formula:

(1)

Where:

- Norm of the complex number, dimensionless.

- Direction of the complex number, measured in radians.

- Power of the resulting complex number, dimensionless.

Given that , then the following variables are:

(2)

(3)

And the norm and direction of the complex number are, respectively:

and

Then, the complex number is:

Which corresponds to point A.

a) 0.25x times 3. (could be wrong on equation.)

b) 2.25 pound of dark chocolate. (can i eat all the chocolate? plz? anyway, again, could be wrong, but i hope im right. all the chocolate together should be 5.25 pounds)

have a good day!

a. she will receive a refund of $278.

step-by-step explanation: