Amother weighs her baby by holding the baby and stepping on a scale. their combined weight is 143 pounds and the mother's weight is 128 pounds. how much does the baby weigh? let w be the baby's weight. which equation can be used to find the baby's weight?
a. 143-w=128
b. 143-128=w
c. w+128=143
d. all of the above

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 %