The IT Help Desk has key performance metrics including lengt…

The IT Help Desk has key performance metrics including length of time to resolve calls.  Assuming the distribution of length of time to resolve calls is normally distributed, which approximately determines how many observations are within two standard deviations of the mean? 

Background In a biosynthetic pathway (a series of chemical r…

Background In a biosynthetic pathway (a series of chemical reactions that build complex molecules), the final product often prevents the first step of the pathway from occurring. This helps regulate the process and prevent the overproduction of the end product (aka runaway enzyme action). Question What is the name of the regulatory process that prevents excessive enzyme activity and overproduction of a final product?

Use Spanish accents where appropriate. PC Alt Codes á = Al…

Use Spanish accents where appropriate. PC Alt Codes á = Alt + 0225 é = Alt + 0233 í = Alt + 0237 ó = Alt + 0243 ú = Alt + 0250 ñ = Alt + 0241 ü = Alt + 0252 ¡ = Alt + 0161 Á = Alt + 0193 É = Alt + 0201 Í = Alt + 0205 Ó = Alt + 0211 Ú = Alt + 0218 Ñ = Alt + 0209 Ü = Alt + 0220 ¿ = Alt + 0191 Mac Option Codes Accented (´) vowels = Option + e, then vowel ñ = Option + n, then n ü = Option + u, then u ¡ = Option + 1 ¿ = Option + Shift, then ?