Help me! Use exponents to write each expression:0.5x0.5x0.5

Any is very appreciated! (picture is provided below)not sure how to do this at all won't lie

50 points and will mark brainlest 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? yes or no? = explain your mathematical thinking:

If cos(θ)=2853 with θin q iv, what is sin(θ)?