What is the equivalent 2's complement representation for 15 i 16 bit hexadecimal representation? a) fffe b) 7ffe c) fff1 d) 7ff1

An atom's diameter is about 0.1 nanometer (1×10-9m), and a human hair is about 1×10-3m. how many times greater is a human hair than an atom's diameter? sorry pushed wronf button but this is math

Ihave been given the number of guns per 100, and the total firearm-related deaths per 100,000. i have to find the actual number of guns per country and actual number of gun-related deaths. if somebody could show me how to do 1 question, i can finish the rest, i am just confused. tia

Text or graphics that print at the bottom of every page are called footings footers headers headings