Please help me with help please please 6 to 9 please

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?

Which statement about perfect cubes is true

How do you use the elimination method for this question? explain, because i really want to understand!