If every positive number has two square roots and you can find the length of the side if a square window by finding a square root if the area, why is there only one answer for the length of a side?

Identify a1 and r for the geometric sequence an= -256(-1/4) n-1

Jose bought 20 shares of netflix at the close price of $117.98. in a few years, jose sells all of his shares at $128.34. how much money did jose make? a.) $192.50 b.) $207.20 c.) $212.50 d.) $224.60

Express the following as a function of a single angle. cos(60) cos(-20) - sin(60) sin(-20)