Order 47/10, 4.1, -5, and 16 squared from least to greatest

Based on what i know about mean, this doesn't add up.

The radius of the circle is 4 cm and the measure of the central angle is 90° the area of the sector with a central angle measuring 90° and radius of length 4 cm is vt cm the triangle in the sector is 4 cm the area of the triangle is v/cm² the area of the segment of the circle is (471 - ) cm?

The variable in a relation who’s value depends on the value of the independent variable is called what?