Please answer this I need it asap

The edge of a cube was found to be 30 cm with a possible error in measurement of 0.4 cm. use differentials to estimate the maximum possible error, relative error, and percentage error in computing the volume of the cube and the surface area of the cube. (round your answers to four decimal places.) (a) the volume of the cube maximum possible error cm3 relative error percentage error % (b) the surface area of the cube maximum possible error cm2 relative error percentage error %

1.based of the diagrams what is the the value of x? 2.how would you verify your answer for x

Alex measured the length of an item to be 3.7 cm. the actual length is 3.5 cm. what is alex’s percent error?