Last year chelsea and sonya took 236 pictures during . this year chelsea and sonya each took the same amount of pictures. all together they took 500 pictures in both years. how many pictures did each girl take at this year? write an solve an equation, make sure you show your work. ( answer i need this for thursday)

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 %