Question

(PICTURE ATTACHED) please help

Answer 1

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

$9 \times 1 {0}^{15}$

Proof:

$1 {0}^{2} = 100$

$1 {0}^{3} = 1000$

Hence, the number of zeroes is equal to the exponent.