Chris and kate’s dinner bill, including a 20% tip, is $95.40. what was the amount of the bill before the tip?

Ineed in figuring out this problem.

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

The collection of beautiful oil paintings currently on display at an art gallery well defined; set not well defined; not a set