Plz someone help me ASAP on my last question

Need 50 will mark brainliest answer. find the lengths of all the sides and the measures of the angles.

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 %

In the diagram, ab is tangent to c, ab = 4 inches, and ad = 2 inches. find the radius of the circle.