Pls help it is 60 points plus big brain boi trophy 5 questions if you do not know the answer move on

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?

What is the radius of a circle with an area of 78.5 cubic inches? use 3.14 for pie

The measures of the legs of a right triangle are 15m and 20m . what is the length of the hypotenuse