Which of the following is the correct form of the quadratic​ formula for the quadratic equation ax2+bx+c=0? x=−b±b2+4ac√2a

x=b±b2−4ac√2a

x=−b±b2−4ac√2c

x=−b±b2−4ac√2a

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In a class, there are 12 girls. if the ratio of boys to girls is 5: 4 how many boys are there in the class

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