So I’m doing a sheet about surface area and the joke is what an octopus is can you help me in some way

Which equation can be used to measure the density of water in a spherical water tank? let w represent the number of water particles within the region.

Scenario: a rectangular plot of ground is 5 meters longer than it is wide. its area is 20,000 square meters. question: what equation will you find the dimensions? note: let w represent the width. options: w(w+5)=20,000 w^2=20,000+5 (w(w+5))/2=20,000 w+2(w+5)=20,000

If you measured the width of a window in inches and then in feet with measurement would you have the greater number of units