If you use Excel 40 hours a week (and those are the weeks you are on vacation), welcome to the MrExcel channel. Home to 2,400 free Excel tutorials. Bill "MrExcel" Jelen is the author of 67 books about ...

In "Mapmatics," a mathematician tells the stories of how math helps us track epidemics, map the seafloor, and plot a complex delivery route.

Night - Mostly clear. Winds from SW to SSW at 6 mph (9.7 kph). The overnight low will be 51 °F (10.6 °C). Mostly cloudy with a high of 62 °F (16.7 °C). Winds variable at 5 to 12 mph (8 to 19.3 kph).