If i have a 76.6 in math and i get a 56 on a quiz whats is my grade now

Find the roots of the equation below. x^2 - 6 + 9 = 0

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

Triangle knm is what is true about the sides of knm