a regular octagon divides into how many triangles drawn from a point in the center of the octagon please fast

Aswimming pool had 2.5 million liters of water in it. some water evaporated, and then the pool only had 22 million liters of water in it. what percent of the water evaporated?

Alice is paying her bill at a restaurant. but tax on the cost of a male is 5%. she decides to leave a tip 20% of the cost of the meal plus the tax

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