Idk bro but pick the first one that comes to mind
Answer:
-1/12
Explanation:

look up the derivation by Srinivasa Ramanujan for a formal proof.
Answer:
Check your router connections then restart your router.
Explanation:
When the internet connection is not displaying properly then the first step is to check the router. The network icon on the internet displays the availability of internet. Adjust the router and see if the router is working properly. If not restart the router so that it adjusts its settings to default. The connection will be available on the computer and internet will start working normally.
Answer:
Hacking Online Orders Math
Explanation:
Answer:
C
Explanation:
Joe should backup all his data from his old mobile device to his PC and then import all the data to his new device via PC. This is the fastest way for transferring data than all the other options mentioned. Most of the time the devices with different OS cannot connect via Bluetooth so option B is not suitable here. If we talk about logging in to same email provider on the new device, it might work but it'll take a lot of time to transfer data to a new device since the data is been copied through internet. If Joe has a strong internet connection than it might be a suitable option for him but what if the connections breaks down in middle of transfer? Similarly NFC also uses internet connection, but that's not only the problem with NFC, like Bluetooth, NFC also works with similar OS devices. Apart from that NFC only transfers small payloads of data.