#11-13 please (show work for the graph and equation for #12 and #13)

How do i make someone brainliest? (if you answer me, i might be able to make you brainliest! )

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

Worth 100 points need the answers asap first row -x^2 2x^2 (x/2)^2 x^2 x is less than 2 x is greater than 2 x is less than or equal to 2 x is greater than or equal to 2 second row -5 -5/2 4 5 •2 is less than x& x is less than 4 •2 is less than or equal to x & x is less than or equal to 4 •2 is less than or equal to x& x is less than 4 •2 is less than x& x is less than or equal to 4