Plz help, it’s on khan academy

Moira has a canvas that is 8 inches by 10 inches. she wants to paint a line diagonally from the top left corner to the bottom right corner. approximately how long will the diagonal line be?

Look at this pattern ; 1,4,9, number 10000 belongs in this pattern . what’s the place of this number?

Collin did the work to see if 10 is a solution to the equation r/4=2.4