A factory makes window frames. Type 1 has one windowpane, Type 2 has four windowpanes, Type 3 has nine windowpanes, and so on. How many window panes will there be in Type 8?

Tabby sells clothing at a retail store, and she earns a commission of 6.25% on all items she sells. last week she sold a pair of jeans for $32.50, a skirt for $18.95, and 2 blouses for $14.95 each. what was tabby's total commission? a $4.15 b $5.08 c $81.35 d $348.60