Fiona has proved that a function, f(x), is an arithmetic sequence. How did she prove that? (1 point) She showed that an explicit formula could be created. She showed that a recursive formula could be created. She showed that f(n) ÷ f(n − 1) was a constant ratio. She showed that f(n) − f(n − 1) was a constant difference.

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 %