#### 231
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- A sequence is defined by \( a_n = 2n^2 + 3n + 1 \). What is the 10th term?
- \( a_{10} = 2(10)^2 + 3(10) + 1 \)
- Calculate: \( 2(100) + 30 + 1 = 200 + 30 + 1 = 231 \)
- A rectangular prism has dimensions 4 cm by 5 cm by 6 cm. What is the surface area?
- Surface area = \( 2(lw + lh + wh) \)
- Length \( l = 4 \), width \( w = 5 \), height \( h = 6 \)
