Answer:
option 1
Explanation:
it is because they need better security for operational
The sheave wheel is a pulley wheel that sits above the mine shaft. The hoist cable passes over the sheave wheel and then down the shaft of the mine.
(copied from google)
Answer:
The minimum number of bits necessary to address 8K words is 13.
Explanation:
You have the number of words to address that is 8000 words, a word is the smallest addressable memory unit.
8000 words can be addressed with 
units. Now you have to find the value of n that approximates to the number of words.
So you can see that 13 bits are needed to address 8K words.
The answer is B: Yahoo! mail
Donna is able to install Yahoo! mail as an app on her portable devices like phones and tablets and be able to organize her Google mails, Outlook, and yahoo accounts. The beauty of it is that you are able to sign in with any account (non-Yahoo emails). anywhere and at any time. It also provides 1000 GB of free secure cloud storage.
