3 tickets to the museum cost \( \$ 12.75 \). At this rate, what is the cost of: \( \begin{array}{ll}\text { a. } 1 \text { ticket? } & \text { b. } 5 \text { tickets? }\end{array} \)

To find the cost of one ticket, we can divide the total cost of 3 tickets by 3. So, \( \$ 12.75 \div 3 = \$ 4.25 \). Therefore, one ticket costs \( \$ 4.25 \). For the cost of 5 tickets, we simply multiply the price of one ticket by 5. So, \( \$ 4.25 \times 5 = \$ 21.25 \). Thus, 5 tickets will cost \( \$ 21.25 \).