Mr. Lee wants to buy books for his students. The amount of money he will spend in dollars is 1.5b, where b is the number of books he buys. If he buys 11 books, how much money will he spend?
If Mr. Lee buys 11 books, the amount of money he will spend can be calculated by substituting b = 11 into the given equation:
1.5(11) = 16.5
Therefore, Mr. Lee will spend $16.50 if he buys 11 books.