If a cube's opposite vertices are 6 meters apart, what is the length of each edge?

Can somebody 1. what is the formula for finding the vertical distance between two points on a coordinate plane?

Dots sells a total of 279 t-shirts ($2) and shorts ($4). in april total sales were $670. how many t-shirts and shorts did dots sell?

Aregular hexagonal pyramid has a base area of 45 in2 and a lateral area of 135in 2. what is the surface are are of the regular hexagonal pyramid