Hello! PLZ HELP!! How do you change ur account name?

Are special combinations of keys that tell a computer to perform a command. keypads multi-keys combinations shortcuts

Light travels at a speed of 186,000 miles a second. the distance light travels in a year is 5,865,690,000,000 miles/year 5,865,695,000,000 miles/year 58,656,950,000,000 miles/year 6,789,000,0000 miles/year

Match the function to its purpose. fast worth 50pts.