80 ? 860 1550 2440 3530	Choose the correct choice from the following answers.
A) 370  B) 840  C) 750  D) 860  E) 960
10^2 - 20 = 80   20^2 - 30 = 370   30^2 - 40 = 860   40^2 - 50 = 1550   50^2 - 60 = 2440   60^2 - 70 = 3530.   370NSWER:370
<result>A</result>
80 ? 860 1550 2440 3530