(2ײy²)⁰ I need help with exponents

Consider a cube that has sides of length l. now consider putting the largest sphere you can inside this cube without any point on the sphere lying outside of the cube. the volume ratio -volume of the sphere/ volume of the cube is 1. 5.2 × 10−1 2. 3.8 × 10−1 3. 1.9 4. 2.5 × 10−1 5. 3.8

Solve the triangle. a = 21°, c = 105°, c = 5

Def rotates 90 clockwise about point a to create d’ e’ f’. therefore, which equation must be true ?