The answer is C. because it is the only one that does not contain a common factor
It would cost $20.12 because if you multiply $4.47 by 4 pounds you would get 17.88. Then, you would divide $4.47 by 2 and get 2.235 but round that number up to $2.24. After adding $17.88 and $2.24 together, you recieve a total of $20.12
Hope this helps you!
Answer:
for binary 101111010001. for octal 5721. for base 5 - 44100