Final answer:
The cost of the movie ticket is now $11.50 after a 15% increase.
Step-by-step explanation:
To find the cost of the movie ticket after a 15% increase, you can multiply the original cost ($10) by the percentage increase (15%).
15% of $10 is $1.50, so the ticket price increased by $1.50.
The new cost of the movie ticket is the sum of the original cost and the increase, which is $10 + $1.50 = $11.50.