Please answer this question correctly

Can (2,3 and square root 10) be sides ona right triangle?

The perimeter of a rectangle is 42 inches. if the width of the rectangle is 6 inches, what is the length

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 %