Estimate a 25%tip on a bill of $67.87 by first rounding the bill amount to the nearest ten dollars.

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

When rolling 26 sided number cube what are the chances some of the role will be seven

7x^2-9x+5=0 find the discriminant and number of real solutions