Answer:
A
Step-by-step explanation:
9,460,528,400,000,000 can be rounded off to
9,000,000,000,000,000.
A trick you can use for these questions is count the number of zeroes at the end.
There are 15 zeroes, hence the answer is
[tex]9 \times 1 {0}^{15} [/tex]
Proof:
[tex]1 {0}^{2} = 100[/tex]
[tex]1 {0}^{3} = 1000[/tex]
Hence, the number of zeroes is equal to the exponent.
