7^9 - 7^2 is approximation of which of the following? Choose the correct answer:  A) 7^9  B) 9^8  C) 9^9  D) 9^11  E) 9^10
=&gt; Since 9^2 is a small number compared to 7^9, it can be disregarded. Thus, 7^9-7^2=7^9 is derived and the answer is 7^9.
<result>A</result>
7^9 - 7^2 is approximation of which of the following?