1. A bit-map terminal has a 1920 * 1080 display. The display is redrawn 75 times a second. How long is the pulse corresponding to one pixel?
2. In a certain font, a monochrome laser printer can print 50 lines of 80 characters per page. The average character occupies a box 2 mm * 2 mm, about 25% of which is toner. The rest is blank (i.e., no toner) The toner layer is 25 microns thick. The printer's toner cartridge measures 25 * 8 * 2 cm. How many pages is one toner cartridge good for?