1. Marla's investment club buys some stock, and she will get $\frac{3}{5}$ of the dividends. If $D$ stands for the stock dividends, which expression represents Marla's share?
2. The final cost of a project was 2000 dollars over its budget. If the budget was $b$ dollars, which expression represents the final cost of the project?
3. Francine saves $\frac{1}{5}$ of her monthly spending money, $m$. The expression for the amount she saves is ___.
4. Which expression represents the area of a rectangle with side lengths $a$ and $b$?
5. Let $c$ be the cost of a light bulb. Which expression represents 'three times the cost of a light bulb'?
6. Let $b$ be the savings account balance. Which algebraic expression represents "three-fifths of the savings account balance"?