Answer:
2¹² Bytes
Step-by-step explanation:
One kilobyte is 2¹⁰ bytes.
File size of the email is 4 kilobytes. That is 4 times 1 kilobyte. Therefore multiply with 4.
4 KB = 4 × 2¹⁰ B
Now notice that you can rewrite 4 like 2².
4 KB = 2² × 2¹⁰ B
Use exponental rule (Product Rule):
[tex]a^x + a^y = a^{x+y}[/tex]
4 KB = 2²⁺¹⁰ B = 2¹² B
