Find the measures of the acute angles of an isosceles right triangle.

Hi, can anyone show me how to do this problem? 100 points for this. in advance

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 %

What percent of 18 is 24? and plz explain thx.