A computer has a hard drive that stores approxamately 9*10^8 bytes. A high density 3.5 inch floppy disk holds approximately 1.4*10 bytes..

Question

A computer has a hard drive that stores approxamately 9*10^8 bytes. A high density 3.5 inch floppy disk holds approximately 1.4*10^6 bytes. How many floppies are needed to back up the hard drive.

Answer 1

(9 x 10⁸) / (1.4 x 10⁶)

6.428571429 x 10²

642.857

 

You need to get 643.