Which of the following is closest in value to (9^12)-(9^2)?  Options
A) 9^9 B) 9^8 C) 9^7 D) 9^12 E) 9^5
9^12 is much larger number than 9^2 and as we need approximate value then it's pretty much negligible in this case, so: (9^12)-(9^2) = ~9^9.   Answer: D.   Similar questions to practice:   Hope it helps.
<result>D</result>
Which of the following is closest in value to (9^12)-(9^2)?