Final answer:
It will cost $15 for 20 tickets.
Step-by-step explanation:
To find out how much it will cost for 20 tickets, we need to calculate the cost of the tickets first and then multiply it by 20. Each ticket costs $0.75, so to find the cost of 20 tickets, we multiply $0.75 by 20.
$0.75 x 20 = $15.
Therefore, it will cost $15 for 20 tickets.