Find domain, range and whether it is a function or not and whether it’s discrete, continuous or neither

Joe has some money in his bank account he deposits 45$ write an expression that represents the amount of money in joe's account

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 %

Which is the graph of this function 3 square root of x plus one if