The Mac's Startup Chime tells you that your Mac is working properly. If it changes to some other sound then there is a problem with your Mac. You can press the mute sound key before you shutdown the Mac then it will startup still muted or there are a several pieces of software, such as Psst (see link below), that will silence the chime for you.
drag it to the trash
Turn it off. Sorry :(
pull the battery out :P
Buy a Mac
go to system preferences
System Preferences/ Speech
welcome center
because you are pregnant
You change your game mode to survival or adventure
you have to download air play on the device then log in with your apple id , also to turn it off from your mac you go to system pref , display , airplay , turn off
You don't usually have to turn off the "mouse and keyboard" at all. On some models of the mac, the power button was on the keyboard, but pressing it starts the computer, it doesn't turn off the keyboard. If you have a wireless keyboard/mouse, then if you don't turn them off they're still running on battery power. The batteries won't last as long if you don't shut them off, but you don't HAVE to do it.
no