Chapter 11 - Sequences; Induction; the Binomial Theorem - Chapter Test - Page 860: 16

$8000\ lb$

1. We have an arithmetic sequence $100, 130, 160, ...$ with $a_1=100, d=30$ 2. For $n=5$, we have $S_5=\frac{n(2a_1+(n-1)d)}{2}=\frac{5(2(100)+30(5-1))}{2}=800$ 3. With each set repeated 10 times, we have the total weight as $8000\ lb$