USE G O O G L E you will get your answer quicker than a jiffy on a stick:)
Answer:
4 se eu não asetar mi disputa amigo
A1=24
<span>n=500(seq #) </span>
<span>d=how much u add each time=6 </span>
<span>a(n)=24+(500-1)(6)=3018</span>
10.2 all you have to do is add up all the sides... hope this helps!