Are the ratios 4:1 and 14:3 equivalent?

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

If you were constructing a triangular frame, and you had wood in the length of 4inches, 4 inches, and 7 inches, would it make a triangle? would you be able to create a frame from these pieces of wood?

Solve for x. x/5+ 1 = 7 x = 5 5/6 x = 30 x = 35 x = 40