what is the square root of 83,521 ?
"1 ) checking the last digits in the answer options a , c , e are out since last digit of the square is known to be 1 . 2 ) c = 489 ^ 2 and e = 511 ^ 2 c = ( 300 - 11 ) ^ 2 and e = ( 300 + 11 ) ^ 2 since we need the answer less than 90000 = > e is out . thus we have c as the ans ."
circle_area(divide(83,521, multiply(const_2, const_pi)))