<PRE><B>Question 921280</B>
Trees___________ApplesPerTree________TotalApples
__30_______________500_______________30*500
__31______________500-7______________31(500-7)
__32_____________500-2*7____________32(500-2*7)
__33____________500-3*7_____________33(500-3*7)


This may be easier to analyze using how many additional trees beyond the initial 30 trees.  Pondering the pattern for total apples, if x is the number of ADDITIONAL trees beyond 30, then total apples for the orchard is {{{highlight(f(x)=(30+x)(500-7x))}}}.


Can you do the rest?</PRE>